Using nano-elastomers within the carbon structure, the carbon’s surface area is less affected by fracturing caused by impacts The nano-elastomers provide an ultra high toughness to block cracking and withhold the resin from separating from the carbon fiber. In fact in laboratory experiments, the GIc has shown to be above 1000J/m2 (GIc = Fracture Toughness (Gc) under Mode I).

Differing from old-style precast rings, A-Pro-developed particular spoke reinforcement with isotropic design works to transfer spoke tension away from the spoke hole to the rim body. This design not only decreases spoke tension and spoke fatigue, but provides an overall lighter weight rim.

High Toughness Resin System provides great impact performance, increasing the force resisted when riding on hard rocks. In case of the carck shown, High Toughness Resin System stops the extension of the crack.

Differing from old-style precast rings, A-Pro-developed particular spoke reinforcement with isotropic design works to transfer spoke tension away from the spoke hole to the rim body. This design not only decreases spoke tension and spoke fatigue, but provides an overall lighter weight rim.

Carbon fiber flows continuously over the bead area to provide the best impact resistance and a significant strength increase compared to a clincher rim.