Carbon rim is mixed up by layers of carbon material in different angles, the more layers we put in a rim, the stonger it becomes, as a result, the weight is also increased. So we have to find a balance between weight and strength. After testing a lot of prototypes in different amount of layers, we found the balance, now the rims we are using for Pro Series are strong enough to handle a heft of 300kgs, but their weight are still controlled to be light enough for you to build a lightweight bike.
By a limitation of the weight, if the single layer carbon fiber can be stronger, we will be able to bring more durability to a rim, so the carbon fiber is all-important for a rim. We have choosen Toray Japan to be our exclusive carbon fiber supplier, their ability to supply stable quality is well known by the industry. Our whole product line is using their T700SC carbon fiber, which supports us make our wheels strong and durable.
High Tensile Carbon Toray T700C
Material is crucial for a rim, so we select material very carefully. There are 3 main places producing carbon fiber material, they are Japan, Taiwan and China Mainland. Toray Japan is the largest and best carbon producer in the world, their products are used in many of the airplanes.
The carbon we use is T700SC from Toray, although Toray\'s price are almost 2X than those from Taiwan and 3X than China Mainland, comparing the durability and stiffness it brings, it is definitely worthy.
Carbon material is 8 times as strong as steel by weight, but is not so good at handling impact forces. We mix 9 layers of the carbon material in different angles, a mixture of different angles resemble a uniform material,and they make the rim body resistant to all kinds of forces.
35+4 Layer Spoke Hole Wall
Spoke hole burden most of the weight, for the spoke hole wall, we use as many as 39 layers to make it, these layers make the rims extremely stiff and durable.
Extra 4 Layers On The Braking Track
By adding 4 extra layers of carbon material to the braking track, the braking track is much more durable, but not add much extra weight.
Basalt Fiber Braking Surface
Heat can result instability to the Carbon Fiber, but not to the Basalt Fiber, a Basalt material can maintain it\'s stability under 760 Centigrade. By applying a layer of Basalt fiber on the braking surface, our Pro series can take much more higher temperature than other full carbon wheels. We have tested this by riding the Pro wheeset 450C on a 5km long descending at 35km/H average speed.