Thread-together bottom brackets provide a secure and stable shell interface for smoother operation and extended bearing life. Hybrid AL6061/Nylon fiber cups for a superior fit and noise-free operation. Low-friction dual seals protect the bearings from harmful contaminants. Sealed premium bearings are both serviceable and replaceable. Designed for installing SRAM DUB 28.99mm spindle cranks into PF30 frames.68/73mmx,46mm. PF30. SRAM DUB 28.99mm. AL6061/Nylon Fiber.,125g.Black.
