High-precision tooth profile: The 12-speed 10-50T/52T flywheel is made of quality steel material,high temperature resistance,corrosion resistance, anti-rust, non-deformation, wear-resistant,high performance of durability,good impact performance,high-precision tooth shape,loss- tooth design, strong compatibility,make riding increase more possible Design: Our mountain flywheel adopts a hollow design, which reduces the weight and the burden of long-term cycling. Perfect operation to achieve the best performance and maximum safety and longevity. Compatibility: Compatible MISCRO SPLINE Tooth range: 10-12-14-16-18-21-24-28-32-36-42-50T 10-12-14-16-18-21-24-28-32-36-42-52T Easy to Install:Professional manufacturing, directly replace your old or broken freewheel.Wonderful accessory for mountain bike and Road cycling.Easy installation, no need to make any adjustments to the transmission Speed: 12-speed 10-50T/52T Color: Silver-Black Compatibility: MISCRO SPLINE Incompatible: SHIMANO HG & SRAM XD Applicable:MTB Micro Spline flywheel, 12-speed 10-50T/52T, accurate positioning, compatible with 12-speed DEORE M7100, M8100, XTR M9100