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Optimal helmet rim striking platform is designed to redistribute neck forces and provide the helmet with freedom of movement
The GPR material provides low abrasive interaction with brake rotor and much calmer braking thanks to the metal-ceramic friction compound composition
you will need an SR5143 (as a replacement to the original rack or handles) or an SRA5143 (for mounting on original aluminium rack with electromagnetic joint and floating plate
you simply remove the detachable thermal and waterproof liner and let the fully ventilated 3D air mesh chest
CARBON-look Knuckle protection
Renthal Sprocket Twinring Black 49T Bi-Metal Grooved S3-Cat-ClearanceProducts-Casualwear Optimal helmet rim striking platformThe Renthal Twinring Rear Sprocket is a long lasting durable Off Road sprocket that was developed and tested over the course of 5 years. The unique flat face two piece design keeps weight to a minimum and maximizes durability all while keeping a narrow profile. The outer steel ring is expanded at 200C and then fitted to the aluminum inner before cooling, this process creates a permanent bond while flat socket set screws prevent lateral movement
