Feature 1Premium materials: This crank arm for e-bike mid-motor is made of premium aluminum alloy, durable and strong support. 2Small and lightweight: This crank arm is designed to be small and lightweight, so it will not burden the e-bike too much. 3Easy to install: This crank arm for mid-motor is easy to install and disassemble, practical, easy to use and easy to handle. 4Robust and non-deforming: These crank arms are robust and durable. High strength, high hardness, not easy to deform. 5Perfect accessories: This motor crank arm is perfectly suitable for BOSCH mid-motor, providing good experience and performance. Item Type: Crank arm for mid-motor Product Material: Aluminum alloy Weight: 540 g / 19.05 oz Center distance: Approx. 17 cm / 6.69 inches Specification: BNI MINI ISIS spline hole (10 teeth, raised point inner diameter approx. 15 mm)
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