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Electric Bicycle TongSheng Mid Drive Motor TSDZ2 Speed Reducing Gear Shaft for 250W 350W 500W 750W Ebike Accessories Features: 100% brand new and high quality. Made of high quality steel material, durable and practical, long service life. Professional manufacture, excellent characteristics, high reliability. Wonderful accessory, suitable for TSDZ2 middle motor. Simple designed, easy to operate, convenient to use. Specifications: A: straight teeth B: helical teeth Color: silver Material: steel Note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture …