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Best bike bottom brackets - July 2026

Last Updated - July 17, 2026

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SHIMANO

Shimano Square Type Bicycle Bottom Bracket - BSA 73Mm, Spindle: 122.5Mm (Ll123) - Ebbun300C23X

SHIMANO

More Details
Main highlights
- Stylish black finish complements any bike setup, making it an ideal choice for both performance-oriented riders and casual cyclists seeking dependable, easy-to-maintain components.
- Optimized for JIS square-taper cranksets, the BB-UN300 Bottom Bracket provides reliable performance and durability for a smooth cycling experience.
- Featuring materials and precision engineering, this bottom bracket offers long-lasting corrosion resistance and smooth rotation for demanding cycling conditions.
- Designed to fit 73mm wide BSA (English) frames with a 1.37-inch shell ID, ensuring universal compatibility with a wide range of mountain and road bikes.
- Constructed with a hollow spindle for improved weight savings and enhanced stiffness, boosting pedaling efficiency and power transfer on every ride.
2
Best Value
12% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SRAM
12% Off

SRAM DUB English Bottom Bracket - English/BSA, 68/73mm, Black

SRAM

(12% Off)

More Details
Main highlights
- With an oversized spindle that works across every bottom bracket standard, this bottom bracket simplifies crankarm compatibility and offers versatility for various bike setups.
- Upgrade your bike's performance with the SRAM DUB Sealed Cartridge Bearings Threaded BSA Bottom Bracket, designed to deliver smooth and long-lasting power transfer to your drivetrain.
- Gutter Seal Technology� ensures superior protection against the elements, keeping your bottom bracket functioning at its best in any conditions.
- Experience a significant weight reduction compared to the GXP system, enhancing your bike's overall efficiency and performance.
- Enjoy the convenience of sealed cartridge bearings, providing reliable performance and easy maintenance for your bottom bracket.
(12% Off)
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SHIMANO

Shimano Bottom Bracket. Bb-Un300. Spindle Square Type. Shell:BSA

SHIMANO

(5% Off)

More Details
Main highlights
- Spindle Length: 113
- Fits JIS square-taper cranksets
- Crankarm fixing bolts sold separately
- Bottom Bracket Shell I.D.: 1.37
- BB Shell Width (mm): 68 mm
(5% Off)
4
10% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

BUCKLOS
10% Off

BUCKLOS Bike Square Taper Bottom Bracket - 68/80/90/100/110/120x110.5 113 116 118 122.5 127 140 152 156 166 174mm Bicycle BSA Brackets for Mountain/MTB/Road/Fat Bike/Ebike

BUCKLOS

(10% Off)

More Details
Main highlights
- 【Super-Accurate Bearings】Sealed bearings provide smooth operation and no noise during long-term cycling. Comes with two waterproof and dustproof hex screws to improve service life
- 【Long Service Life】Bucklos bottom bracket is made of high-quality materials, sturdy and durable, with minimal maintenance
- 【CNC Precision Thread】CNC precision thread, finely crafted& easy to install. Can connect bicycles well and reduce energy loss
- 【Broad Compatibility】Compatible with BSA bicycle base threads of 68/80/90/100/110/120 mm. The recommended size is for reference only. Please purchase according to the original size. Installation and replacement can be done using BB tools
- 【Brand Service】Please make sure to confirm the correct axle size and length suitable for your vehicle model to ensure compatibility. If you encounter any problems before purchasing, please feel free to contact us at any time
(10% Off)
5
10% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

BUCKLOS
10% Off

BUCKLOS Bike Square Taper Bottom Bracket - 68/80/90/100/110/120x110.5 113 116 118 122.5 127 140 152 156 166 174mm Bicycle BSA Brackets for Mountain/MTB/Road/Fat Bike/Ebike

BUCKLOS

(10% Off)

More Details
Main highlights
- 【Super-Accurate Bearings】Sealed bearings provide smooth operation and no noise during long-term cycling. Comes with two waterproof and dustproof hex screws to improve service life
- 【Long Service Life】Bucklos bottom bracket is made of high-quality materials, sturdy and durable, with minimal maintenance
- 【CNC Precision Thread】CNC precision thread, finely crafted& easy to install. Can connect bicycles well and reduce energy loss
- 【Broad Compatibility】Compatible with BSA bicycle base threads of 68/80/90/100/110/120 mm. The recommended size is for reference only. Please purchase according to the original size. Installation and replacement can be done using BB tools
- 【Brand Service】Please make sure to confirm the correct axle size and length suitable for your vehicle model to ensure compatibility. If you encounter any problems before purchasing, please feel free to contact us at any time
(10% Off)

Best bike bottom brackets - July 2026

Shimano Square Type Bicycle Bottom Bracket - BSA 73Mm, Spindle: 122.5Mm (Ll123) - Ebbun300C23X

SRAM DUB English Bottom Bracket - English/BSA, 68/73mm, Black

Shimano Bottom Bracket. Bb-Un300. Spindle Square Type. Shell:BSA

BUCKLOS Bike Square Taper Bottom Bracket - 68/80/90/100/110/120x110.5 113 116 118 122.5 127 140 152 156 166 174mm Bicycle BSA Brackets for Mountain/MTB/Road/Fat Bike/Ebike

BUCKLOS Bike Square Taper Bottom Bracket - 68/80/90/100/110/120x110.5 113 116 118 122.5 127 140 152 156 166 174mm Bicycle BSA Brackets for Mountain/MTB/Road/Fat Bike/Ebike

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