Shimano FC-R9100 Dura-Ace 2x11 Speed Crankset - 175mm, without Chainrings Heavy The Serfas® RX-RR saddle is

The Serfas® RX-RR saddle is our lightest RX saddle to date

we went further and optimized the hood shape to fit hands of all sizes

Roll-Top design excludes the need for zippers

The supersonic was the first of our generation brackets - resulting from careful analysis of the way riders use their aerobars and the adjustments that need to be made

Compatible with Shimano 9-Speed STI levers

Shimano FC-R9100 Dura-Ace 2x11 Speed Crankset - 175mm, without Chainrings Heavy The Serfas® RX-RR saddle isFor 2x11 speed chainrings *Does not include chainrings or bottom bracket Features Accommodates frames with shorter chainstays (410mm) and 135mm rear spacing New designed crank arm maintains high rigidity provides optimum power transfer and reduces weight 4 arm construction crankset Adapted for race specific disc brake system Redesign the gear teeth profile to fit wider gear pitch