RedShift Sports Replacement Spring Kit - Fits 27.2mm ShockStop Endurance SeatPost +25% Stiffness MFPN=MR-21-4-123-K The weight savings were minimal

The weight savings were minimal but they sure looked cool

If you're planning to customize and aerodynamically optimize your road bike on your own the A 510 is the right choice for you

}Wheels Manufacturing Derailleur Hanger - 288

4Mm Rise 9

RedShift Sports Replacement Spring Kit - Fits 27.2mm ShockStop Endurance SeatPost +25% Stiffness MFPN=MR-21-4-123-K The weight savings were minimalReplacement springs are an ideal upgrade if you need a bit more stiffness from your ShockStop Suspension Seatpost. The stiffer springs provide a more topped out feel or if you're at the upper end of the weight range and want more support. Approximately 25% more stiffness than the standard spring set Includes two steel springs (one outer and one inner spring) Only compatible with the 27. 2mm diameter versions of the ShockStop Endurance Seatpost (both