This product is suitable for retrofit folding bike, city bike, electric bike.<br> lightweight, high axial strength and compatibility.<br> Standard precision machining, chain retention, increases service life, and reduces friction.<br> A good replacement for bike repair and upgradation, compatible with many bike models.<br> 170mm crank arm length without any overlap of crank arm and chain ring bolt.<br> Specifications: 48TBED double cover x 170MM handle square hole, with 9/16inch pedal axle, chain cover,<br> Introduction: Compatible with 6/7 speed post change, installation recommendation: suitable for lithium battery/bicycle type lithium battery/bicycle etc.<br> Colour: black<br> Material: aluminum alloy<br> Package Contents:<br> 1 x Crank set<br> Only the above package content, other products are not included.<br> Note: Light 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.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store