SunRace RD-M37 6/7-Speed Rear Derailleur Shimano Compatible Apparel Brand_Swiftwick LOOK spindles are only approved

LOOK spindles are only approved after a rotational test of 2 million cycles at 100tr/min with a load of 90kg on the center of the pedal and an eccentric rotation (creating a shock on each rotation)

R4 carbon injected nylon outsole: moderately stiff for efficient power transfer in comfort

Compatible with all forward and double bridge fork designs

an innovative and elegant bike storage idea that hangs your bike by the front wheel and allows it to safely swing sideways

5" wide and without tread

SunRace RD-M37 6/7-Speed Rear Derailleur Shimano Compatible Apparel Brand_Swiftwick LOOK spindles are only approved6 7 speed MTB rear derailleur Engineered polymer and steel construction Direct mount with optional hanger included SHIMANO Equivalent RD TY21 RD A070 Speed: 7sp Max: 30 Wrap: 37 Cage Mount: Mid Ratio: 2to1 Color: BLK Wgt: 265g