Protect the crank arm from damage when changing pedals and extend the axle core to achieve the law of and save effort. If your feet are relatively , it will cause friction between the shoe and the crank arm, which can also be solved. Protect the crank arm thread on the chainring and replace the pedal multiple times without worrying about the wear of the crank arm thread. Increase the pedal distance. The axle core extender is widened by 16mm/0.63inch on one side, which greatly improves the comfort when cycling with a thick body and a wide hip. Reinforcement structure design concave-convex platform installation position. The structure is reinforced and safety is guaranteed. An 18mm/0.71 inch wrench or adjustable wrench is required for disassembly and assembly. Splicing uses a single-sided spacer to extend the same side of the axle tooth, the spacer can be increased to 32mm/1.26 inch after stacking. Product Name: Bicycle Pedal Extender Color: Black Material: Aluminum Alloy Size: 16mm Package Contents: 1 Pair x Bicycle Pedal Axle Extender The above package content only, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.