This Shimano BB-UN300 bottom bracket is a solid and smooth-running square taper bottom bracket. You can easily mount the matching crank on it and it has a good durability. High quality and performance This Shimano BB-UN300 square axle bottom bracket in the Alivio range has a very strong and durable design, allowing you to transfer power to your wheels with as little resistance as possible. The axle is made of steel and the bearings are well sealed. This makes this bottom bracket durable and low-maintenance!
This Shimano BB-UN300 bottom bracket is a solid and smooth-running square taper bottom bracket. You can easily mount the matching crank on it and it has a good durability. High quality and performance This Shimano BB-UN300 square axle bottom bracket in the Alivio range has a very strong and durable design, allowing you to transfer power to your wheels with as little resistance as possible. The axle is made of steel and the bearings are well sealed. This makes this bottom bracket durable and low-maintenance!
in 30 offers
This Shimano BB-UN300 bottom bracket is a solid and smooth-running square taper bottom bracket. You can easily mount the matching crank on it and it has a good durability. High quality and performance This Shimano BB-UN300 square axle bottom bracket in the Alivio range has a very strong and durable design, allowing you to transfer power to your wheels with as little resistance as possible. The axle is made of steel and the bearings are well sealed. This makes this bottom bracket durable and low-maintenance!
This Shimano BB-UN300 bottom bracket is a solid and smooth-running square taper bottom bracket. You can easily mount the matching crank on it and it has a good durability. High quality and performance This Shimano BB-UN300 square axle bottom bracket in the Alivio range has a very strong and durable design, allowing you to transfer power to your wheels with as little resistance as possible. The axle is made of steel and the bearings are well sealed. This makes this bottom bracket durable and low-maintenance!
Last updated at 10/05/2026 00:33:42
Shimano BB-UN300 Vierkant-Innenlager // BSA 68x113 mm (Alivio)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano BB-UN300 BSA square bottom bracket Version 68 x 113 mm
Delivery between Mon – Tue $40.73
Shimano BB-UN300 Bottom Bracket 68 x 113mm
Delivery between 11–20 May $12.95
Shimano Bottom Bracket BB-UN300 68 x 113mm
Delivery $14.95
Shimano BB-UN300 68x113mm Square Type MTB Bottom Bracket
Delivery between Tue – Fri $9.90
Shimano BB-UN300 Bottom Bracket 68x113mm Without Fixing Bolts
Delivery between 11–18 May $9.99
Shimano BB-UN300 Bottom Bracket 68x113mm Without Fixing Bolts
14-day returns
Shimano BB-UN300 Bottom Bracket - 68MM-113mm
Delivery between Wed – Fri $9.95
Shimano BB-UN300 Bottom Bracket - 68MM-113mm
Delivery between 14–22 May $9.95
Bb-Un300 Bottom Bracket 68X113Mm Ll W/O Fixing Bolts
Delivery between 14–22 May $9.95
| Collect | 29 Everyday Rewards points |
| Shimano Series | Nexis Inter-3 |
| Thread | English Thread |
| Frame Width | 68mm |
| Bottom Bracket Length | 113mm |
Shimano BB-UN300 Vierkant-Innenlager // BSA 68x113 mm (Alivio)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano BB-UN300 BSA square bottom bracket Version 68 x 113 mm
Delivery between Mon – Tue $40.73
Shimano BB-UN300 Bottom Bracket 68 x 113mm
Delivery between 11–20 May $12.95
Shimano Bottom Bracket BB-UN300 68 x 113mm
Delivery $14.95
Shimano BB-UN300 68x113mm Square Type MTB Bottom Bracket
Delivery between Tue – Fri $9.90
| Collect | 29 Everyday Rewards points |
| Shimano Series | Nexis Inter-3 |
| Thread | English Thread |
| Frame Width | 68mm |
| Bottom Bracket Length | 113mm |
