SRAM DUB Threaded BSA Bottom Bracket Smith Optics for efficient power transfer and

for efficient power transfer and a solid feeling when you stand on them

X9 XO and XX1 crank arms

115952 (CAN) & 6

350 or 440 hubs

the heritage of performance has a new milestone

SRAM DUB Threaded BSA Bottom Bracket Smith Optics for efficient power transfer andIts the one bottom bracket system to rule them all sort to speak. The SRAM DUB bottom bracket system was created to simplify the relationship between chainring, crank, spindle and bottom bracket. It has found the sweet spot between 30mm and 24mm spindle diameters, offering some of their best qualities in one package. FEATURES Material: Aluminum BB Interface: English Threaded Weight: 76g (BSA) Compatibility: DUB bottom brackets fit all frame shell