Stages Cycling Shimano XT M8100/8120 L MTB Crank Arm Power Meter

##Stages Cycling Shimano XT M8100/8120 L MTB Crank Arm Power Meter Bringing their expertise to the off-road market; the Stages Cycling XT M8100/8120 L MTB Crank Arm Power Meter has all the same benefits as their road based power meters. The unit itself adds just 15 grams to the base crank arm; and can measure power output up to 2;500 watts with +/- 1.5% accuracy. It has IPX7 water resistance to cope with use off-road in all conditions and automatic temperature compensation for maximum accuracy in rapidly changing conditions. Battery replacement is a tool-free operation and the firmware can be upgraded wirelessly. ##Compatibility * Compatible with Shimano XT M8100/8120 Hollowtech II mountain bike drive side crank arms * Device Compatibility: ANT+; Bluetooth Smart Ready * Software Compatibility: Stages Link; Training Peaks; Strava; Garmin Training Center and others ##In the box * Non-drive-side crank and power meter * High quality CR2032 coin cell battery * Lifetime access to Stages Link for power meter management and firmware upgrade. * 2 months free access to Stages Link premium training and coaching features. * Product Identification Card with Serial Number and ANT+ ID Number. * User Guide ##Is my bike compatible with Stages Power Meters? To help find your current crank model; check the inside of the crank arm for the model and length. The next step is to check the power meter’s compatibility with your frame; if the space between your crank arm and seat stay fits a 10mm Allen key wrench between 5cm and 12cm from the centre of your bottom bracket; this should be compatible. Still unsure? See this illustration for a guide of where to measure.