Bike Crank Arm, 1 Pair Durable Diamond Hole Bicycle Arm for BMX Old School Cruiser Cyclocross Mid Drive Motor

【High Quality Material】The crank arms are made of high quality materials, sturdy, durable, high strength, high hardness, and not easy to deform 【Wide Application】The bike crank arms are suitable for BMX bike, BMX bike - old school, cruiser, cyclocross bike, electric bicycles, folding bicycles, mountain bicycles, etc 【Perfect Design】The crank arms adopt sample design, fine workmanship, used for bike mid drive motor installation. Size is about 21 * 3.8cm / 8.26 * 1.5inch. Weight is about 450g 【Easy to Install】The crank arm is lightweight and small size, easy to install and use 【100% Satisfaction Guaranteed】 We provide a customized and professional customer service before and after your purchase. If you have any questions about the product, please contact our customer service immediately we will help you within 24hours. If any quality issue, we will provide you with replacement or full refund at any time