Stages Power Meter L Dura-Ace R9100 172.5mm. The new Gen 3 single-sided Stages Power L meter is built on to a non-drive-side Shimano Dura-Ace R9100 crank arm and is compatible with all Shimano Hollowtech II road drivetrains. At Incycle Bicycles, we strive to harness the power of bikes to advance the good in everyone by providing exceptional value and service, supporting riders of all levels, and giving back to our communities. Please note: All bicycles will be assembled and test ridden by our professional mechanics to ensure proper and safe operation before being sent out to the customer.This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters". The seller is "incycle-bicycles" and is located in this country: US. This item can be shipped to United States.