[Item Feature]: This ball bearing retainer with 22 balls, which are suitable for 31mm inner diameter head parts. It is an ideal replacement for your bike.
[Application]: This kind of bead rack stainless steel ball is inlaid in the retainer design. It's suitable for replacing the crank bearing of the bicycle. suitable for ordinary bicycles, mountain bikes, lowrider bikes, and stretch bicycles.
[Notice]: Before purchasing, please confirm whether the size of the accessories of your bike is matched these bearing cages.