Shimano XT RD-M8120-SGS Rear Derailleur - 12-Speed Long Cage Black For 2x CheckoutSpec= 268mm } Pedal-based power meters for Stroke Length:75Mm/162Mm Color Black Rings 46 CH0723 MFPN=00.6118.738.016

Shimano XT RD M8120 SGS Rear Derailleur 12 Speed Long Cage Black For 2x CheckoutSpec= 268mm } Pedal based power meters for Stroke Length:75Mm 162Mm Color Black Rings 46 CH0723 MFPN=00.6118.738.016 } Pedal based power meters for road (compatible with SHIMANO SPD SL cleats) install like any other pedals and quickly transfer between bikes New strain gauge and gyroscope make these power meters highly responsive and + 1% accurate New force data provides insight into your performance and the relationship between power and cadence when used with your compatible Garmin cycling computers and smartwatches Pedal IQ smart calibration feature alerts you when you need to calibrate based on several factors TR Tubeless compatible casing sealant required