Shimano BB-UN300 Square Type Bottom Bracket 73x122.5mm

Get top - notch quality and performance with this Shimano Tourney TX800 square bottom bracket. It features cartridge bearings and fits 73mm bottom bracket shells with a 122.5mm axle length.

Using this Shimano bottom bracket is easy. First, make sure your bike has a 73mm bottom bracket shell. Then, carefully install the bottom bracket with the 122.5mm axle into the shell. When riding, avoid hitting rough surfaces too hard to prevent damage. For maintenance, clean it regularly with a soft cloth and add a bit of lubricant to the moving parts every few months. This will keep your bottom bracket working smoothly and extend its lifespan.