Seller notes

Feature:1. Fitment: Rear chain sprocket is good replacement for MONKEY Z50A Z50 Z50R Z50J, suitable for 420 pinion electric tricycle. 2. Characteristic: 420 chain rear sprocket has 29‑tooth, the outer diameter is 122mm/4.8in, and the inner diameter is 30mm/1.18in. 3. Premium Material: The sprocket is made of high quality steel alloy, which is , has strong toughness and long service life. 4. Compact Size: The rear sprocket adopts a simple design, lightweight and compact, easy to carry and use, ...

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