Sram DUB BB121 Pressfit Bottom Bracket Model:PF 121mm The two super durable o-rings

The two super durable o-rings secure it to the bar

Power and Macro XL Drives

high-wear situations e-bike riders face

and 8mm hex

Sram DUB BB121 Pressfit Bottom Bracket Model:PF 121mm The two super durable o-ringsThe new SRAM DUB bottom bracket series has a simple jobconnect your crankarms and protect the smooth, long lasting application of power to your drivetrain. To allow that singular focus, weve engineered the DUB spindle to be the one true unifying component. One oversized spindle to work across every bottom bracket standard. For better crankarm compatibility. For better protection from the elements. For longer lasting performance. To be stronger,