J-ZJ2020001

Apply To Bike crank Bike crank Bike crank Bike front wheel Bike rear wheel Bike headset. In order to protect the Retainer, it is normal to have a little grease on the Retainer. 【Application:】: This kind of ball bearing stainless steel ball inlaid in the retainer design,It is a bicycle parts, it's suitable for replacing the crank bearing of Kid Bicycles.