Type B is usually used for locking two-piece discs of bicycles. Type C is usually used to lock the single-piece chainring. If you remove the cap, you can directly lock the smallest plate in mountain.
With maximum precision and durability, it makes your bike look unique and cool.
This screw is used to fix the large and small plates of the chainring.
Made of steel material, the screw is durable.There are 2 specifications for you to choose from Type B, Type C. Mountain crankset generally uses 4pcs.
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