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Zipp chief engineer talk about their own carbon fiber bike wheels
2016-06-14
Some time ago I wrote an article about the industrial revolution of the wheel group comments, which involved 50 wheels are "95% performance zipp wheels, but only 42% of the price of the product zipp." However, I soon received an Email from zipp engineer Andy Paskins and Josh Poertner, saying my comment was "very disappointed." They think my comments this very misleading, not only failed to clarify the facts, but to confuse. In addition, other brands of wheels because investment in marketing and less on the more expensive proposition, pointing out that he in the rain-delayed research and development costs of new products and technology is brought with the team than the sum of the marketing expenses fees are several times higher Zipp team of people was "downright crazy."
I reply, they say I have spent a few months hoping to chief engineer poertner zipp and conduct an interview, also urgently want to know Zipp party rhetoric, the results of it, did not even have one about to see. Soon, I will meet with Poertner and conducted an interview, Poertner openly expressed any issues can be openly discussed.
Results poertner flight, eloquent, even more than we reporters can speak. The next article will be so content is a direct reference to Poertner original words and rephrasing.
Although Zipp is one of our most loyal sponsors hope that the conversation between us no cover bar.
Zipp VS Asian brands
First, we gigantex Hang Yi as an example, we discuss the different zipp and Taiwan carbon fiber products between manufacturers.
In Zipp404 and 808 wheels, for example, they need to produce "After 150 hours of wind tunnel experiments, spent an hour at 900 US knife, plus the cost of additional transport time, rapid prototyping wheels produced from a blank single table to produce products such as 808, may have to hit the 500,000 dollar. we prepare wind tunnel experiments,
research and development project, the rim shape the development process, we have to take into account the carbon fiber in the lamination, test, safety test, sample test ride, test ride etc ...... when we finally completed all the research and development of new products, in order that all our expenses already exceeded 500,000. "
In contrast, after the wheel manufacturer Nima Asia will Zipp wheels away, "within three days you can get almost identical replica of the rim. We know that carbon fiber is not burning, However the epoxy will, so they put our wheels in the oven heated to a high temperature of 800 degrees, then all of the epoxy resin has been burned out of carbon fiber
laminate structure so they glance. such a , we took 12 to 14 months, up to $ 500,000 spent on research results, is likely to become the basis for their development. and with them, their product development only about 30 days, you only need to spend 10,002 to 10 005 thousand dollars. "
Results gigantex Hang Yi so let guests come up with a free a la carte "menu rim" to. Anyone can pick out such a product catalog and then quickly added to the wheel group production occupations. I was puzzled and asked poertner, if he had to say is true, then why would anyone choose zipp wheel sets, rather than simply buy a knockoff trouble.
"First of all, I understand that we are to serve as a complete wheel set system operation in the development of a specially designed wheel system rim, flower hub, spokes and spoke nipples produced. Therefore, the wheels and flowers holes on the hub spokes are designed to exactly match the angle of the drill. in addition, only if you know how to spend the hub will be used when its behalf to eliminate every gram of excess weight. every detail carbon fiber laminates are It is adjusted according to the number and the actual pressure of the spokes. with our flower hub, for example, no brand in the industry with technology able to close. we are producing the lightest of those flower hub, the largest and most wide use flange, and then with the road wheel hubs group spent the longest axis that can be used in combination in order to increase the rigidity. in addition, we also used a specially designed patented Swiss bearings. and when you need something special too when parts suppliers are not in stock. "
Although the final opinion Zipp is a product company, but on the core of our work, we actually produce a killer product has technology research and development company. I know Zipp position in the industry: a full horsepower in product and technology development, regardless of cost, and strive to bring further benefits the entire industry while advancing scientific and technological progress of the team. I firmly believe that there is such a customer base in the market, they are in order to accumulate more advantages, we are willing to present the latest and most high-quality technology products pocket. Our target customer base, compared to those incremental costs or pay more attention to price competition through the use of the product itself and the people.
"Whether it is automotive, motorcycle industry, or photographic equipment also, or stereo equipment manufacturers, there are so regardless of the cost innovation, thus boosting the company's entire industry forward. In contrast, products of these companies other than the most companies sell Degui. If you are a company focused on product sales, then you will be more concerned about how to save costs, how the cheapest way to meet customer demand for a product technology, but if you the company is a science and technology school, then you will be more concerned about how to improve the performance advantages of the product, how to upgrade the product, or how it can bring some extra features to the product and then decide whether to put this product into a customer can afford the cost structure we again another very interesting from the perspective of comparison of these companies will find, leading high-tech company's products in a similar industry has never been the most expensive option, is often the most expensive and exclusive focus on fashion rather than leading technology brands ... in our industry it is an indisputable fact. a price of $ 2285 Zipp wheels really cheap price, but if it is under the premise of fair competition, the price of our products is competitive. on the market there are more than a dozen wheels 3k price, but no one can compete in the same frame rim, better than the competition type zipp wheels. a few months ago, a European magazine editor told me that he was surprised us products also appear in a rigid, bearing lubrication on the forefront of aerodynamics and three charts, before they think we just have a main aero products. in short, in each chart, we are ranked within the top three., wherein the wheel set of products tested range from $ 1,500 to $ 10k, while the price of Zipp wheels will have less than the median price and the number of test rounds all groups. "
Poertner noted that 404 rim in seven years has been updated 6 times revision, the rim 808 in the five years conducted three times, and this is regardless of the cost to send science and technology development examples. He also said zipp will continue to go all the way, and hope that their struggle will eventually return.
Zipp wheels plastic prototype can withstand not only the real tire pressure, but also to support the rider's weight, which allows the rider under realistic conditions of multiple sets of wheels model for rapid testing. So we come with a new marketing campaign slogan "based on wind tunnel experiments and development, rather than just through wind
tunnel testing."
Next, I asked to poertner Regarding the 404 new rad brake ring, this design is a legacy of 808.
"Oh, that ah, we have better luck. But it is also a good example on zipp product legend. When you seriously think you will find some of the issues that bring radians brake ring design such as the production sector will 'how do quality control to it?' If it is a straight-edge level of the brake ring, you just took a turn on the caliper measurement as well. Once the brakes have a circle arc, how do you expect in the absence of professional measuring equipment case, rely on the rim to make a circular motion around the center axis of curvature of the complex will be able to brake circle so do quality control? radian brake ring on this concept, we are 03 or 04 years and 808 developed, probably 05 the
year, we are on the quality control system for the perfect replacement. now if some rim production line, will be responsible for the robot to do quality control. for me, that is the essence of these high-tech Zipp. technically , which for the quality control of products is a real, it can be measured, quantifiable progress. Similarly, for the product itself, this new technology enables a better brakes brake ring tune, better rain brake performance and superior aerodynamics. As for those small grooves on the rim, in fact, similar to the story. after the idea of forming a groove golf two years, we developed a modeling tool can be manufactured technology, manufacturing and into the rim which is often said that anything experienced frenzied, unbearable pain after being obtained are worth it, indeed. "
We have to put this technique to figure out rims, experienced hardships like a lost dog, so anyone who wants behind us, they have to know it. If you only produce this circle with a curvature of the brake, without doing quality control, then it is tantamount to suicide. In fact, engineering modeling and design like a bicycle race. The game is not that the way to win people riding fierce, but those smart, to understand the technical and tactical coordination, in the longest game suffered the most painful talent to win the game. This is, for me, to make science and technology zipp different, then we have developed quality control and management products from concept to production and processing all technologies. All production processes are in a three-dimensional integrated factory, fully controlled by us.
When I asked about the competition between two wheels Zipp and Mavic companies, Poertner pointed out that the two companies actually focus on the two markets in different directions. Advantages Mavic wheels that weight and rotational inertia, and the advantages of zipp focused on aerodynamics, while taking into account the weight, inertia, and bearing efficiency.
Zipp vs Mavic
Some people are particularly valued inertia, but inertia is actually just a two phenomenon, it is not so important. Not weight, not inertia, it is the most important factor is the impact of aerodynamic wheel speed. All things are add up, lightweight wheels will help you save 1-2 watts of power, the inertia of good can save you a little bit of power, but good pneumatic wheels, at a certain speed By then help you save up to 40 watts of power. Under R-sys and 808 on the difference in weight as much as there is one lbs, but 30mph (equal to about 42.28 km / h) speed of 808 can save more than 50 watts of power for you. Of course the problem is that the idea of consumers to know 1350g and 1680g,
compared to people who this is a real difference. For people who argue about the inertia sounds more tricky, because they always heard how how important weight wheel group. The advantage of the aerodynamics can not see or even touched.
My brother asked to Poertner fact aerodynamic advantage is difficult to quantify and is easy to form a vortex. Many wheel manufacturers will quote wind tunnel test data to prove their wheels can be fastest.
Mavic is about weight and rotational inertia, Zipp is focused on aerodynamics
"Yes, this stuff is because the price is too high a wind tunnel tests caused no one really wants to do this kind of experiment, while in the US media which, it too much like a political grenade up (Edward said: Announced it is the ultimate winner will not make you and your sponsor famous in the world) in the world, to my knowledge only Germany "Tour Magazine" guys doing wind tunnel experiments to test the true sense. "Tour Magazine "every year to get a bunch of wheels to do wind tunnel testing, and the entire disclosure of their data. for us, the good news is that Zipp is" Tour Magazine "victorious generals. so for zipp, in the market as long as there are tests, there is local data, our products will prevail. But even so, the test results can be misleading or, for example, a company can come up with their products an individual marketing campaign to highlight the data, or It is a magazine in a wind tunnel experiment only tested under zero degree yaw data, to give appraisal called "the fastest wheels", but on the low probability of occurrence of the conditions of this test did not mention, but indeed nobody wants to play "just maintain the fastest wheel set at 4% of the time," so it's propaganda. "
In addition, the company Zipp more favorable power meter is born. As you can see, especially when you want to parse the experimental data, you can use the power meter to test their components. For example, the topic of the forum wattage, or use in triathlon competition aspects of slow muscle. For example, Andrew Coggan, as a master of power, he is
really doing power metering and publish measurement data person. For us, this is a good thing, because we always do it well.
Zipp company when Jan Ullrich (Ulrich) Preparing for 2000 Olympic Games to prepare a set of wheels, cock were using ceramic bearings. Poertner of a university student was in the shuttle manufacture sophisticated ceramic bearings, and ceramic bearings and it has become attached to the bicycle.
Until 2001, Zipp wheels Release Z series products have all been equipped with ceramic bearings. And today, "ceramic" already familiar in the bicycle industry, and even become a fast-growing "brand." However, it was misunderstood by the public.
The reality is 90% of the ceramic bearings in cycling were never meant for this type of use.
"Bicycle industry, 90% of the ceramic bearings (also known Bearings) does not apply to a bicycle wheel. So why is there a ceramic bearing it? 90% of global ceramic bearings are used to solve the problem of thermal deformation. These people put cheap the bearing is inserted into the high temperature part, because with steel bearings can not solve the problem of thermal expansion. now we put in the ceramic bearing flowers bicycle hub, then you also know that our customers have complained that they spend very hub bad, or even directly damage or bearing children pits and cracks appear. this flower hub problem suddenly appeared in Zipp's customer base, but we have not heard from direct bearing fracture
Zipp, in fact, there have been no such cases then we gradually discover, 'I spent $ 200 to buy a certain brand of bearings, then you must be a problem caused by the hub shell flower!' because the bearings are ceramic! "
"In fact, these ceramic bearings customers now spend $ 200 autonomous decline bearing quality levels, this is a bad investment. It's like pushing a boulder uphill, as seems pointless (myth of Sisyphus, Sisyphus offended gods, gods to punish Sisyphus, they asked him to put a boulder onto the top of the hill, and because of that stone is too heavy, often not on top of the hill and down the hill to go, come to naught, so he repeated, endless to do it - no more than that the gods for such invalid hopeless labor harsher punishment of Sisyphus life in such a useless and hopeless labor which slowly depleted. existentialist novelist Albert Camus often used to describe the myth of Sisyphus of human life, he believes pushing the stone uphill, endless hard labor undoubtedly is a symbol of the absurdity of human existence most vivid; but at the same time, he is not human
despair, not depressed, the revolt in absurd, absurd fate of the fight in the end at the side of the banner [dao]). However, in terms of quality and customer is responsible for, 'ceramics' brand stronger than Campagnolo. we have become accustomed to this phenomenon a. non Zipp on the client autonomous 'upgrade' with ceramic bearings after the emergence of our number one flower hub of complaints. this just reflects the popularity of ceramic bearings. look at these complaints data, our customers there are about 5% to 10% of people have pointed out that they 'upgraded' ceramic bearings and bearing quality compared to our inventory significantly worse, the best case is only equivalent, while the
standard Zipp bearing only from Swiss industry bearings, uses the value provided by CeramicSpeed 750 dollars (corresponding to Zipp wheel set) upgraded ceramic bearings in the same factory and produced using the same technology ABEC5 seat part, and the cost price of $ 125 a set, and most of the "ceramic bearings" the same or even higher.
Zipp vs Hed
Steve Hed, and he shared Zipp bell-type (also known as an annular) rims patent, once told me that he hated because Zipp Zipp wheels can not produce the correct shape. He believes Zipp wheels only draw a slick drag numbers at a yaw angle, and Hed wheels drag can perform better over a wider range of yaw angles.
Poertner for Steve Hed told this anecdote to laugh and pointed out that two things jointly owned patent when the ring. And before 2004 Zipp produced before the 808 Group, the two companies have not used the rim shapes like 808, 808 in addition to the breakthrough rim width widened to 28mm, the two companies are also not used over such a wide rim, but now this has become a basic design of a wide rim round the two companies set up. Poernter noted that in recent years, Hed wheels shape and wind tunnel data and as a result became the ugly Zipp's. In addition, Poernter also noted Zipp is the only company developed a "real possibility of crosswind angle theory" of the company. And after the theory developed whereby Zipp wheels to meet optimal performance in the most common situations.
What we have done is for a variety of side wind angle on the actual road, we often encounter on Zipp wheels designed and optimized.
"Steve really think crosswind crosswind angle smaller than the angle makes more sense. You can find a crosswind angle calculator on Hed site. This program which has a rider, riding through the direction and speed of the rider, in addition also when riding wind direction and speed, you can calculate the instantaneous crosswind angle. " This calculator For me, it can only be used to determine the day's maximum crosswind angle. And now there is a simple hand calculation methods, namely rider speed and angle reverse direction tangent wind speed.
So if you are in the 20mph speed riding, vertical wind speed of 10mph, wind speed can be drawn yaw angle of 26 degrees. Hed view is that 'since it is a common wind speed 10mph, 20mph speed riding is common, then the crosswind angle of 26 degrees is the case we need to study. 'Our view on this issue is that we want to yaw sensor mounted on the head pipe (at 6, 7 years ago by Zipp developed the sensor) in combination with mathematical modeling both in terms of results. 26-degree crosswind angle is exactly perpendicular to the wind situation when the rider, but once the road turned, the rider will be turned, the wind will change, in addition to the ground wind speed is not necessarily the same as the high wind speed, so that there Thereby hangs a tale, not a single 26-degree crosswind angle can generalize.
If you look at the exchange of personnel and meteorological services, they will tell you about 8mph uniform wind during the day has been there from a certain direction. Ah, but that is three meters from the ground meteorological service measuring rod to the top of the measured data. Surface wind speed is likely to be slower. However, even if the wind
speed at 8 or 10mph, but you just ride back and forth perpendicular to the direction of the road when you have how long? So we started measuring the probability of so-called "real crosswind angle" appears. In most cases, you will get a bell curve, the two ends of this curve are 0 and maximum crosswind angle (actually result Zipp wheels model is measured from a maximum negative to maximum positive angle degrees the bell-shaped curve (0-degree angle in the middle), attached two small bell-shaped curve, for simplicity, we will look at it as a 0-degree curve to the maximum crosswind angle). In the more advanced science and technology era, we use GPS to measure and record the actual speed of the rider and the riding direction, and the weather service measured wind speed data superimposed with computed. In this way we will be able to draw the exact distribution of the force crosswind different angles. In addition, we found that these measurement data and 02-03 when he was on paper come to our original model is consistent.
We went on to say Hed. His house in the lab, said crosswind angle of 26 degrees is the truth, but we think 26 degrees is actually a maximum crosswind angle. If the measured and plotted my way then 13 degrees wind angle should be the most frequently occurring side. This is the place Zipp and Hed parted ways. We use the measuring sensor mounted on the head pipe to collect data for up to several months of actual riding and assumptions used to support previous conclusions. The actual riding crosswind angle we encounter may be only 7-15 degrees, you ride slower this point on, and vice versa. As more than 20 degrees or 20 degrees crosswind angle is very rare, because then the peak crosswind angle will reach 40 degrees or greater, in which case or else you ride very slowly, or else experiencing abnormal winds, but then most people will tend to choose lower frame wheels.
In fact, Steve calculation method is particularly suitable for 3-spoke wheels, because before the 20-degree crosswind angle performance 3 spoke wheels are balanced. With crosswind angle expanded to 20-35 degrees, the speed advantage 3 spoked wheel group is very obvious. It can be useful to say - 'you're a certain age group triathlon athletes,crosswind angle when you ride will be between 20 to 30 degrees, and you spoke with three wheels in this section in It is the fastest. 'My view is that, on the possibility of crosswind angle, the same age group of players, Hed think crosswind angle is 26 degrees, and we believe that includes the first deviation, including, in this perspective about 9-17 degrees between. In this case it is entirely another matter children, because there will be a whole wheel speed set at between 9-17 degrees faster than the 3-spoke wheels.
So what we do is through the rim and wind tunnel testing to optimize the shape and design of our wheels crosswind angle corresponding to the way the real world most frequently encountered.
Design of a wheel rim is designed like an airplane wing, right? Given enough time and money, we can do any optimization on the rim we want. Furthermore, we believe this to be optimized based on actual road riding, crosswind angle appears statistical probability modeling results. We will lock Extreme efficiency within 10-15 degrees crosswind angle, in
addition to the minimum wind resistance is also within this range appear. I think that as the actual road riding, GPS data logging, test and power measurements pro team, and time will prove us study the probability of occurrence of side wind angle is more correct. In fact, we do have a market return, but pro team (now the World Tour Racing Team) aspect of our rewarding. In the Tour de France, although only three teams have a formal relationship with us, but in fact there are a total of six teams using Zipp products. We work and testing and those teams are interested in technological innovations, and our record of these data and expertise for these teams, it is here to stay in. "
Speaking of team cooperation and occupation, I asked to see how Poertner 2008 Paris - Roubaix race, race Magnus Backsted of Zipp 303 and DNF'd also damaged, leading to a final defeat.
"Backstedt event is cruel. Our collaboration with CSC between the teams dates back to 2004, Trek team Liasion Scott Daubert then said to me, 'Remember, no matter what causes the car parts broken, there will always be targeting the manufacturers'. I was even told he joked, Hincapie head pipe is not so easy to bad. but when things happen to them when I feel really bad, but this thing is largely but also many of our initial discussions turned into Cervelo test team set up. "
Poertner think they need to be able to have the final say a team of their own. Before 303 group's cobblestone road tests, they invented the "bumps Drum", and the 303 is equipped with 27mm tires set on the "bumpy Drum", and then completed and passed the bump test.
Poertner for Steve Hed told this anecdote to laugh and pointed out that two things jointly owned patent when the ring. And before 2004 Zipp produced before the 808 Group, the two companies have not used the rim shapes like 808, 808 in addition to the breakthrough rim width widened to 28mm, the two companies are also not used over such a wide rim, but now this has become a basic design of a wide rim round the two companies set up. Poernter noted that in recent years, Hed wheels shape and wind tunnel data and as a result became the ugly Zipp's. In addition, Poernter also noted Zipp is the only company developed a "real possibility of crosswind angle theory" of the company. And after the theory developed whereby Zipp wheels to meet optimal performance in the most common situations.
"This is the most bumpy drum delicate machine. Thrashing drum drumhead may be raised at a metal cylinder, which can be pebbles, can be anything you can fix in the above. Then you can make these wheels on the projection operation. in addition this drum can be adjusted by connecting rods plus or minus 15 degrees in the vertical plane, three-dimensional data so that we can gather input into the bumps inside the drum machine, thereby reducing the forces real road ... ... so that we can ride on the cobbled streets full speed, and cornering speed is not affected, in addition we have Thor Hushovd's sprint cycling of data. it is these so that we finished on the true meaning of the wheels fully tested. "
In fact, we have been manufacturing Classic tournament round group thousands of hours of research. The problem faced by the classical race wheels are not durable. We used a week can make in the game will never be broken wheel, but if you use carbon fiber material to do so, because the carbon fiber material is too hard, then you as the force exerted on
the larger carbon fibers, hardness will inevitably increase. Our rim shape is adjustable annular rim shape will produce leaf spring effect, we increase the use of damping materials to absorb vibration damping, so that we can control to some degree the side walls elastic modulus. But the fact is the classic game wheel is too hard, and people are reluctant to ride, especially when classical race car itself has done a perfect situation. So we can see that no parts manufacturers dare to risk a failed attempt to make.
The whole process resulting in the formation of carbon bridge technology, carbon bridge technology is Kevlar wheel suture technique. It is based on local stress and hardness feedback relationship between the formation of a large perimeter efficiency technologies. However, this technique does not apply to the entire rim, so when we add 30% of the
force, wheels hardness increased only a dozen points. "
However, the game that day and no rain, so Backstedt decided to use 24mm wide, 72psi tire pressure tires, and we never his 210 lbs weight and wheel combinations such testing.
Zipp then put the above recording and restoration in the lab and found that each test will cause rim fracture. "A few days after the game, me and him on the phone, he said he participated in the Paris Roubaix race six years, five of which have appeared in the case of damaged or broken wheel. The only condition is that time does not appear, he eventually won the race. then he mentioned those wheels hang up, they say a pit after every round group will be deformed, and the emergence of small cracks, while aluminum wheel rim after deformation will be stretched ( before the break), so you can then ride. Finally, he told me that we never see a carbon fiber wheels in Paris Roubaix race may be on.
As the saying goes, 'the best racing is, when it crossed the finish line a few inches will fall apart, the best use. 'This is what we dug ourselves a hole, and then we jump into it. But today I can confidently say that if Backstedt day use is tested using our 27mm tire, then it is absolutely no problem. "
However, there are things that were not widely reported that Martin Maaskant assembled riding a non-customized version zipp 24mm tire 202 to finish fourth place finish, which means that carbon fiber wheels for the first time withstood Paris Roubaix race.
"It makes us crazy, carbon fiber wheels finish first, players get fourth place, and use a non-customized version of zipp 202 ...... actually is a climbing wheel, and these media have turned a deaf ear. Of course, players only 155 lbs weight, using a 24mm tire. in this weight, the force of the wheel is completely different for me, even more are injured
publishers flaunt failure zipp, as the Daubert foreseen. in fact, however Backstedt and Hincapie two stages both in the Arenberg forest off wheel, front and rear're just a few feet .Hincapie ruining a pair of children HED, but the media have failed to mention this year battles, Hincapie joined the Columbia team (Hed wheels are sponsors, but basically using zipp wheels), using a pair of traditional aluminum wheels. "
Finally, on the Roubaix race this year, a total of 16 pairs of 303 entries, they do not have any problems. Hushovd (Raytheon) said in an interview in which he used the perfect
Roubaix race wheels.
Pro Riders and Wheel Choice
How to choose a professional player wheel
Before we talked about some of the cases, compared to about scientific, professional players will follow their own feelings, personal intuition and even superstition to select the wheel. For example Krstin Armstrong, she did not choose to use sub9 wheels (Zipp wheels, one closed) at the Olympic Games women's TT race, but the choice of common closed
round. Poertner calculated after Sub9 believe will increase 1-2 seconds timing in the ascent, but in the downhill will save 5 or 6 seconds.
"When she spoke after the game feel for the game, I am shocked, she said, 'too tricky downhill, the speed is directly manipulated and brakes locked up, so that any advantage pneumatic wheel brakes will be brought cancel out. '
We like downhill can be simulated by computer modeling, but we are not sure how much to use before entering a curve to the intensity of the brake. There is also a little difficult to consider that the players confidence. I have repeatedly closed round group riding contrast, feel sub9 in the corner when you want faster than 900, it may be due to
sub9 softer. Sub9 wheel rim like a reed, like an elastic, so it is more like riding a spoke wheel.
We also talked about things Andrei Lara and Sub9 wheel sets. His first match is Cervelo P3 + Sub 9. Since P3 compact design of the rear lower fork spacing, making him sometimes when riding wheel wear after the next fork. Although this phenomenon rear lower fork friction should be the frame rather than the wheel, but Andrei Lara was beginning to think Sub9 wheel designed too wide. Until he has changed after more generous under the fork spacing lightning Shiv frame, he began to acknowledge and praise Sub9 wheels.
"After his round Group completed some tests, in a conference call he said to me, 'great wheel, cornering and simply spoke wheels, like, and very comfortable!' He fell in love with the closed wheel a. "
In this way, Andrei riding Sub9 Lara won the Tour de France opener, then he used the same configuration chariot to second place this year, completed the Tour de France stage in Annecy.
Another example is the Carlos Sastre, 08 Tour de France almost every day he rode Zipp202. However, computer modeling shows that if he uses Zipp303 round group arrived at the foot of the mountain Alped'huez, he can save 250 calories.
"For players like him, the most significant in his career recently won several victories have used Zipp202 wheel, then he will have confidence in itself a kind of 202 group performance, and I will not be because the objective of modeling data and thus confidence took some ways in terms of spiritual superiority compared to only two kinds of high and low performance on the nuances between products is equally important. this take 303 and aluminum wheels to replace the training is different, because doing so would bring a big performance gap. What I mean is, you see Zipp808 compared to 202 for the heavier, but if the horizontal comparison, then, than it is on the market all similar groups much lighter .808 round tube fetal weight and CP version of Bora almost, but if you use the CP team round group of people to talk, they will be seen as climbing Bora wheels. this because they are only available Bora.
And our sponsorship team is a little bit spoiled. They have five different frame of a full set of high-wheel, all kinds of closed wheel, the team can be said that everything is free to use. In addition, they also have a wide variety of data available to decide when to use wheels, can fool can say when the team manager. But for those who are interested and proficient riders wheel sets, these will enable them to benefit. "
One of the most talked about story between me and the team, is the Tour de France two years ago, I arrived at the team hotel to stay the day, Andrei Lara entering a stage in Compiegne alone Breakthrough 1km win. That day I spent the day in the car, did not realize what happened, but for this they opened a grand celebration.
Source:tieba
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