* Above image for illustration purposes only

Bottom Bracket Shimano BB-UN55 68x115mm

Genuine SHIMANO quality/performance cartridge bearing square bottom bracket with aluminium adapter. The BB-UN55 model has been discontinued but the replacement is not as good! So if this is the size you need, grab one while stock is still available!

The Bicycle Depot Technical Top Tip: If replacing a Shimano bottom bracket, check that the old one is the correct length before disassembly, that way you'll know for sure what axle length to buy. If unsure of the axle length and type you need, consult a professional bicycle mechanic.