BSA English Threaded GXP External Bearing MTB Bottom BracketInfo Installation Instructions Installation Video Specifications The BBInfinite BSA Threaded GXP External Bearing Bottom Bracket Cups work with all GXP standard MTB cranksets on the market, be it Sram, Quarg, and all others. Alloy bottom bracket cups are MilSpec MIL A 8625 Type II anodized for extreme durability. On the drive side, a polymer labyrinth seal bearing cover with integrated bushing keeps out dirt and debris while isolating the steel
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BSA English Threaded GXP External Bearing MTB Bottom Bracket