Rollerboys will make your bike ride so smooth you'll never want to stop! Their composite material is strong and durable, and the special design of their teeth means you can change gear at almost the speed of light! The high-quality pulley systems are a must for any serious cyclist. With RollerBoys, you're ready for anything!
Narow Wide serrated profile for optimum chain retention.
Composite material supplied by EMS Swiss in glass fibre blend (40 %)
Sealed bearings
Compatible with the SRAM MTB 12-speed system.
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