DRAMATICALLY INCREASED TRACTION
Wide rims support the tires sidewalls better, allowing lower pressures without the tires folding over or burping. This dramatically increases stability and traction. This shows up as faster cornering and braking, better grip in all conditions. How much lower pressure can you go? In general, for a given rider, using tires you've used before in a given locale, you will be able to run lower tire pressures with wider rims. How much lower can only be determined through experimentation. Typically, riders are running 46 psi less than normal. Light riders on moderate terrain are running as low as 15-17psi.
HOOKLESS BEAD RIMS ARE FAR STRONGER
Impact damage is the way most carbon rims die. The rim weve designed is much stronger in the area where impacts occur since it's a solid rectangle instead of an inverted "J". This spreads the impact out over a larger area that is also supported by more material.
We tested the impact strength of several major brands of carbon fiber rims and discovered that the change to hookless bead was a major advantage in impact strength. We also optimized the layup to further increase strength. In the end, our rims are 50 to 300% stronger in impact than competing rims we measured. We dont want to throw anyone under the bus, but we do want you to know that these are well-respected and well-known manufacturers.
STIFFER AND LIGHTER
The switch to carbon fiber as a rim material has allowed us to build a 475 gram 41 mm wide rim, which is lighter than the much smaller and weaker alloy rims it replaces. The 928 is 100g lighter and several times stronger than alloy rims of the same size.
MORE PREDICTABLE STEERING
Without wallowing sidewalls, and with dramatic increases in rim stiffness and contact patch area, the front end of the bike feels more precise and firmly planted than it ever did before. The difference is even greater than the improvements that came from tapered steerers and through axles in recent years.
Weve carefully sized the bead area so that its easy to mount and dismount most tubeless tires by hand. Many tubeless tires will inflate and seat with only a floor pump.
- 28 mm outside, 22 mm inside width, 29 diameter