Protect the crank from damage when replacing the pedals, and extend the shaft core to achieve the law of and save effort. If your feet are relatively, it will cause friction between the shoe and the crank, can also be solved. Protect the crank thread of the chainring, and replace the pedal multiple times without worrying about the wear of the crank thread. Increase pedal spacing. The axle core extender is widened by 16mm/0. 63in one side, greatly improves the comfort of riding a bicycle with a fat body and a wide hip. Reinforcement structure design concave-convex platform installation position. The structure is strengthened, and the safety is guaranteed. An 18mm/0. 71in wrench or adjustable wrench is required for disassembly and assembly. Splicing uses a unilateral distance to lengthen the same side of the axial tooth, the distance can be increased to 32mm/1. 26in after stacking. Product Name: Bicycle Pedal Extender Colour:C:black Material:Aluminum alloy Size: 16mm Package Contents: 1Pair x Bike Pedal Axle Extenders Only the above package content, 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 measurement allowed error is +/- 1-3cm.