FC-R8100-P 12-Speed Double Power Meter Chainset Knog Rear Derailleur : Shimano GRX

Rear Derailleur : Shimano GRX RD-RX400 10 Speed

Lightweight top-hand mesh for superior ventilation

2018 STUMPJUMPER FSR WMN COMP 27

- Lockable clamp and mountings secure the rack to the car and the bike to the rack

Everything you'll need zips into the two secure compartments

FC-R8100-P 12-Speed Double Power Meter Chainset Knog Rear Derailleur : Shimano GRXOffering all the precision and functionality of the DURA ACE road bike power meter, the ULTEGRA FC R8100 P road bike power meter comes in a more affordable package. Scientific training requires accurate measurement and user friendliness, and the new ULTEGRA R8100 power meter delivers both. Its dual sided measurement is accurate within 2. 0%, and zero offset calibration is a quick and easy process. Importantly, its long battery life, easy recharge, and