Bottom bracket with square pin for 68 mm bike bottom. Quick and easy installation without adjustment.
The integrated system can protect the frame, higher power, it is better than the normal middle movement of the structure.
Fine workmanship, small dimensional error, 2 bearing precision wire design, which allows it to connect better to the bike arm
SEAL BEARING: Sealed cartridge bearing assembly – maintenance-free sealed cartridge protects against dirt, mud and water.
Good Service: if you buy the wrong length by mistakes, please ask to exchange to correct length for your bike. please double check before purchasing to avoid trouble.