Origin8's Revolvr PF30/BB386 Thread-Together Bottom Bracket provides 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, while sealed premium bearings are both serviceable and replaceable. - Designed for installing BB30 or BB386 30mm spindle cranks into PF30 or BB386 frames without the need for adapters - Shell: 68-86.5mm x 46mm - Interface: PF30/BB386 - Spindle Type: BB30/BB386 30mm - Cup Material: AL6061/Nylon Fiber - Weight: 120g