4iiii Precision Pro Shimano Ultegra R8100 Dual-sided Crankset
Shimano s New R9200P 8100P Power Meters Technical DifferencesPlease note this power meter is only compatible with Shimano Ultegra 8100 52/36 chainrings. 4iiii precision pro shimano ultegra r8100 dual-sided crankset this item is in the category sporting goods\cycling\bicycle electronics\power meters. The important area to measure is right in the middle of the crank arm.