BB-UN300 Bottom Bracket - English 68 x 107mm Spindle Square Taper JIS

The Shimano BB-UN300 Bottom Bracket is a high - quality component for your bike. It features a 68mm BB shell width and a 107mm square taper JIS spindle. This bottom bracket fits JIS square - taper cranksets perfectly. The spindle is hollow, which helps to reduce weight without sacrificing strength. Note that the crankarm fixing bolts are sold separately. It has a sleek black finish, adding a touch of style to your bike. With a bottom bracket shell inner diameter of 1.37 and an English BB/Frame Interface, it offers reliable performance and a secure fit.

Using your Shimano BB-UN300 Bottom Bracket is easy. First, make sure your bike frame has an English BB/Frame Interface and a 68mm BB shell width. Carefully install the bottom bracket into the shell, ensuring it's properly aligned. Then, attach your JIS square - taper crankset. Remember, you'll need to buy the crankarm fixing bolts separately and install them according to the instructions. When it comes to maintenance, regularly clean the bottom bracket to remove dirt and grime. You can use a mild cleaner and a soft brush. Also, check for any signs of wear or damage, like loose parts or excessive play in the spindle. If you notice any issues, it might be time to replace the bottom bracket. Store your bike in a dry place to prevent rusting of the black - finished components.