Last updated at 12/05/2026 21:12:30
Shimano BB-UN300 Bottom Bracket 73 x 118mm
Delivery between 13–25 May $12.95
Shimano BB-UN300 Bottom Bracket - 73 X 118Mm Xl
Delivery between 18–20 May $9.95
Shimano BB-UN300 Bottom Bracket - 73 X 118Mm Xl
Delivery between 18–26 May $9.95
Shimano BB-UN300 Bottom Bracket 73/118mm XL W/O Fixing Bolts
Delivery between Thu – Tue $9.90
Shimano BB-UN300 Bottom Bracket 73x118mm XL W/O Fixing Bolts
14-day returns
Shimano BB-UN300 Bottom Bracket 73x118mm XL W/O Fixing Bolts
Delivery between 13–20 May $9.99
Shimano Bottom Bracket BB-UN300 Square Type 118mm x 73mm BSA
Delivery $20
Shimano BB-UN300 Bottom Bracket 73 x 118mm XL without Fixing Bolt
Delivery between 18–20 May $9.90
Shimano BB-UN300 bottom bracket British thread 73 - 118 mm
Delivery $11.20
Shimano BB-UN300 73x118mm Bottom Bracket | Ivanhoe Cycles
Delivery between 19–27 May $10
| Included Components | Transmissions |
Shimano BB-UN300 Bottom Bracket 73 x 118mm
Delivery between 13–25 May $12.95
Shimano BB-UN300 Bottom Bracket - 73 X 118Mm Xl
Delivery between 18–20 May $9.95
Shimano BB-UN300 Bottom Bracket - 73 X 118Mm Xl
Delivery between 18–26 May $9.95
Shimano BB-UN300 Bottom Bracket 73/118mm XL W/O Fixing Bolts
Delivery between Thu – Tue $9.90
Shimano BB-UN300 Bottom Bracket 73x118mm XL W/O Fixing Bolts
14-day returns
| Included Components | Transmissions |
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)
The BB-UN300 square taper bottom bracket was launched by Shimano as successor of the models BB-UN26 and BB-UN55. It covers a wide range of applications, from Touring and City bikes to older Road and Mountain bikes. BB-UN300 is available with BSA thread and in different axle lengths. In this type, the bottom bracket axle and crank are connected by a square taper. Does not include crank bolts. About ShimanoEstablished in Japan in 1921, Shimano is the worlds largest bicycle component manufacturer. Whether it be drive systems, brakes, pedals or shoes, Shimano stands for reliable quality and performance. From Road & Gravel to Mountain, Touring & Urban use, Mechanical or Electric.
The BB-UN300 square taper bottom bracket was launched by Shimano as successor of the models BB-UN26 and BB-UN55. It covers a wide range of applications, from Touring and City bikes to older Road and Mountain bikes. BB-UN300 is available with BSA thread and in different axle lengths. In this type, the bottom bracket axle and crank are connected by a square taper. Does not include crank bolts. About ShimanoEstablished in Japan in 1921, Shimano is the worlds largest bicycle component manufacturer. Whether it be drive systems, brakes, pedals or shoes, Shimano stands for reliable quality and performance. From Road & Gravel to Mountain, Touring & Urban use, Mechanical or Electric.
The BB-UN300 square taper bottom bracket was launched by Shimano as successor of the models BB-UN26 and BB-UN55. It covers a wide range of applications, from Touring and City bikes to older Road and Mountain bikes. BB-UN300 is available with BSA thread and in different axle lengths. In this type, the bottom bracket axle and crank are connected by a square taper. Does not include crank bolts. About ShimanoEstablished in Japan in 1921, Shimano is the worlds largest bicycle component manufacturer. Whether it be drive systems, brakes, pedals or shoes, Shimano stands for reliable quality and performance. From Road & Gravel to Mountain, Touring & Urban use, Mechanical or Electric.
The BB-UN300 square taper bottom bracket was launched by Shimano as successor of the models BB-UN26 and BB-UN55. It covers a wide range of applications, from Touring and City bikes to older Road and Mountain bikes. BB-UN300 is available with BSA thread and in different axle lengths. In this type, the bottom bracket axle and crank are connected by a square taper. Does not include crank bolts. About ShimanoEstablished in Japan in 1921, Shimano is the worlds largest bicycle component manufacturer. Whether it be drive systems, brakes, pedals or shoes, Shimano stands for reliable quality and performance. From Road & Gravel to Mountain, Touring & Urban use, Mechanical or Electric.
in 21 offers
The lowest price for Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm) right now is $20.99 at George's Bike Shop, compared across 19 retailers.
The all-time low was $18.55 on 13 Feb 2026 — today's price is 13% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 12 May 2026.
