Serfas RX Saddles are designed to maintain maximum blood flow and reduce numbness while providing the best protection and performance on the market

A brand-new

so you experience less rolling resistance and higher speeds

including sealed cartridge bearings

Sram BSA English DUB 68/73mm Bottom Bracket wahoopromo Serfas RX Saddles are designedThe new SRAM DUB bottom bracket series has a simple job connect your crankarms and protect the smooth, long lasting application of power to your drivetrain. To allow that singular focus, we've 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,