Description of FFWD F6R-C Carbon/Alloy Wheelset with DT Swiss 180 Hubs - Clincher - black/red/white
Fast Forward wheels are lightweight and durable. They convince with high manufacturing quality. The rims of the wheels are handmade in the Netherlands of High-Tensile TC35 carbon. This gives the rims very high strength with sufficient stiffness. For optimum braking performance and added stability the wheels have a milled aluminum braking surface and a welded rim joint. The front wheel features 20 DT Aerolite radial spokes and the rear wheel features 24 double crossed spokes wich ensures optimum stiffness and durability. The DT Swiss 180 is the top-end hub for extremely lightweight wheelsets. The advantages of the 180 are their extremely low weight, their high-class contact free double flange seal system against water and dirt, their bearings made of ceramic wich guarantees for smooth rolling characteristics. Compatible with Shimano 9/10-speed and Campagnolo 9/10/11-speed cassettes.
FFWD DARC technology is short for ‘Double Arc’ which refers to the profile of the rim. The revolutionary DARC profile improves aerodynamics dramatically by reducing the drag. Air has the characteristic to stick to its surface and by creating a negative arc section the air will be compressed more at the positive section. This will increase the pressure just like on the topside of an airfoil. Increased pressure results in a faster airflow and less resistance on the wheel which reduces the drag.
FFWD use High-Tensile TC-35 carbon for the majority of the lay-up. This gives the rim a very high strength with sufficient stiffness to cope with hard application of the wheels. So, rather than use a stiffer, but more brittle carbon type, they chose durability over ultimate stiffness. In some lay-ups FFWD add some higher modulus sheets to increase stiffness locally.
FFWD actually use multiple layers of different types of carbon. Only the outer layer is made from a 3K weave. Underneath this layer are layers of UDF (Uni-Directional Fiber) sheets. A mixture of different angles to resemble a uniform material. Because carbon fiber can handle tension very well, they have to mix up the layers to make the rim stiff and strong enough. Pressure is not a great feature of a fiber. Just think of a string being pushed. But when mixed correctly, the different angles interconnect through the resin to make it resistant to all kinds of forces.
The 3K has a slightly lower stiffness/weight ratio than UDF (Uni-Directional Fiber) sheets of equal fibers, but it makes up by giving the rims a bombproof feature. Why? Because when a strand (or multiple) gets cut in UDF, by crashing for instance, the sheet is compromised and the tear will expand through a larger part of the sheet at continuous workload. A weave will stop the tear because it is intervened by the crossing layer of strands.
Although it is not advised to ride with a 'hole' in your rims, situations can occur where you might not know of a damaged rim or it is not an option to stop right away. Then you have the extra safety of the 3K weave to get you home.
All rims are molded with a process FFWD call Ecom (Equal Compression). This means that the rims are molded with a custom-made air bag that has the inner shape of the rim. This makes sure that the pressure/compression is equal on the entire inner surface of the rim. Result is a practically void less rim section and a smooth wall on the inside of the rim. Without voids, the carbon sheets are completely fused into one system. The rim structure is much better and you can make the rim lighter and stronger.
Ecom also provides for a smooth inside (no wrinkles!) which is a great feature and not common for carbon rims. This is for instance very beneficial for the nipples. Just imagine how the force of the spoke tension is applied through the nipple seat onto the rim itself. If the nipple seat isn't smooth, the transition of the force isn't clean and optimal. This might cause spoke, nipple or spoke hole failure in future. FFWD rims are made with Ecom which ensures longevity
All FFWD wheels are tested by the manufacturer, thereby small traces can be caused to the surface.
Fact Sheet of FFWD F6R-C Carbon/Alloy Wheelset with DT Swiss 180 Hubs - Clincher - black/red/white