Best Racing Bike Bottom Brackets in 2026

14 g lighter than SM-BB6700

smoother than SM-BB6700 (50 % less friction)

small ball bearings keep weight low

Mtb

Hollowtech II

2 items

Mountain Bike Bottom Bracket - Connect your crankarms and protect the smooth, long-lasting application of power to your drivetrain.

Oversized Dub Spindle - Works across every bottom bracket standard for greater bearing durability.

Improved Riding - Better crankarm compatibility, better protection from the elements.

Material: [cups] aluminum

Shell Width: [English] 68 mm, [Italian] 70 mm

Threading: English, Italian

Fits JIS square-taper cranksets

Crankarm fixing bolts sold separately

Hollow spindle

【High Quality】Made of high quality aluminum alloy, this wrench is rather sturdy and durable. High hardness, wear resistance, not easy to scratch the axle.It can be reused.

【Fits】installation and removal 12-notch/24-notch 46mm external bearing bottom bracket cups diameter（no 48mm), such as SRAM DUB, Race Face Cinch, Zipp Vuma, Rotor BSA30(46mm), Hawk Racing BB3086(46mm), and others

【Professional Repair Tool】Professional tool, specially designed for DUB axle installation.

Bearings & cups for one-piece cranks

68mm bottom bracket shell width compatible

24 TPI Treads

High class quality and very durable, brand new and well packed.

Fit for BB-UN26 68*123, 68*127, 68*110mm Square Taper Bottom Bracket.

Interface: Square Taper, Shell Size: 68 millimeter, Bearings: Steel.

Made of high quality aluminum alloy 7075,good quality tool for installing your bottom bracket cups,sturdy and durable. High hardness, wear resistance, not easy to scratch the axle.

Fits for the installation and removal of 16/24-notch external bearing bottom bracket cups with an outside diameter of 44mm 46mm, such as SRAM DUB, Race Face Cinch, ZTTO, BSA30, Hawk Racing BB3086, and others

Professional tool, specially designed for DUB axle installation. Long enough to give you adequate leverage for installing the cups with the force you need.

Fits JIS square-taper cranksets

Available Colors: Chrome, Black, Gold

Available Sizes: 5/16 x 7, 5/16 x 9

Sold as Set of 9 Pieces

Material: [cups] aluminum, [bearings] 6806 stainless steel, [inner sleeve] plastic

Shell Type: English threaded (BSA)

Shell Width: 68/73mm

Bearings & cups for 3-piece cranks. Includes right & left cup, lockring & bearings.

68/73mm

English Thread

PREFERRED BICYCLE TOOL: Great installation and removal tool kit for your bike bottom bracket.

HIGH QUALITY MATERIALS: Constructed of aluminum alloy and stainless steel, very durable.

SUITABLE BEARINGS: Suitable bearings: 6805 (25x37x7), 6806 (30x42x7).

Black BB Bottom Bracket Conversion Kit (American to Euro)

Aluminum cups w/ steel hardware

Converting a non-threaded 68mm American BB shell to an English threaded Euro BB bottom bracket

Size: 68x 118mm

Spindle Interface: square taper.

Finish: Phosphated cups anodized sheath

High Quality-The bottom bracket is made of stainless steel, solid with a long service time. Light weight, no additional burden.

compatible with Size-Suitable for 80/100mm frame shell. Cups thread size and pitch 34.798mm 1.37 * 24TPI.Please use the BB tool to install and replace the bottom bracket for safety.

Integrated System-Integrated system can protect the frame, more power output, it's better than ordinary structure bottom bracket. With two screws, easy to install.

High Quality: Bike Bottom Bracket is made of Aluminum Alloy & PP, this bottom bracket is solid and durable with a long srvice time

Separate Design: The separate rubber gasket with bilateral sliding characteristic, won't inrease the resistance to roration axis

Fitment: This Bike Bottom Bracket is applicable for Integrative Crankset, Prowheel, FSA Integrative Crankset, Sunrace, and SRAM Hollow Crankset( with gasket ring ), whose diameter of the cylinder is about 24mm

Aluminum sheath,cold-forged steel cups, Boron Axel/spindle, Sealed bearings

Finish: Phosphated cups anodized sheath

For bike type: mountain bike, road racing bike etc. Spindle Interface: square taper.

PREFERRED BICYCLE TOOL: Constructed of high quality aluminum alloy and stainless steel. CNC turning, anodizing process, very durable! Great installation and removal tool kit for your bike bottom bracket.

FEATURES: The new aluminum alloy material is used to lighten the weight, the bearing joint, the labor-saving operation can be detached, the CNC handle design, the handle knurling process, to ensure the strength and anti-skid, the stainless steel screw, the thread pitch is close and detailed, and the strength is high!

SUITABLE BEARINGS: Suitable bearings for 6805 (25x37x7), 6806(30x42x7), MR22377(22X37X7), MR24377(24X37X7).

Size: 110.5mm/113mm/116mm/118mm/120mm/122.5mm/124.5mm/126mm

Sealed cartridge bearing assembly, suitable for 68mm frame shell

BSA integrated design, higher performance

Material: [cups] aluminum, [bearings] steel

Shell Width: 68/73mm

Threading: english

Thread: BC1.37 x 24T English Shaft Steel.

Bike Bottom Bracket Model: BC-73.

Size: 68 mm x 118mm.

High Quality: Made of Aluminum Alloy & PP, this bottom bracket is solid and durable with a long srvice time

Separate Design: The separate rubber gasket with bilateral sliding characteristic, won't inrease the resistance to roration axis

Fitment: This accssory is applicable for Integrative Crankset, Prowheel, FSA Integrative Crankset, Sunrace, and SRAM Hollow Crankset( with gasket ring ), whose diameter of the cylinder is about 24mm

Please use the BB tool to install and replace the bottom bracket for safety.

Suitable for 80/100mm frame shell.

The bottom bracket is solid and durable with a long service time.

Dimensions: The outer diameter is about 1.16 inches / 29.5 mm, the inner diameter is about 0.75 inches / 19 mm, and the ball size is 1/4 inch x 9 balls. Please confirm the size before buying! ! ! ! ! ! !

Material: The ball bearing cage is made of steel material, with high quality, high strength, sturdiness and durability, and can be used for a long time.

Widely used for bicycle parts replacement, suitable for bicycle cranks, such as: mountain bikes, children's bicycles, low riding bicycles, children's bicycles, stretch bicycles.

Centerlock rotor tool compatible with 46mm outer diameter 12 groove bottom bracket tool accessories

Made of high quality superior CNC aluminum alloy with anodized coating. Compared with the bottom bracket tool made of ordinary materials, it is strong and durable. It has excellent anti-corrosion and anti rust performance and long service life.

Suitable for Shimano Race Face Cinch,Hawk Racing BB3086, Zipp Vuma, Rotor BSA30, SRAM DUB,etc

【Solid and sturdy】The bicycle bottom bracke is solid and sturdy, withstand long time using.

【For bracket bottom】 The steel shell can absorb roundness tolerance for installing ports of bracket bottom.

【Integrated system】Integrated system can protect the frame, more power output, it's better than ordinary structure bottom bracket, a must have cycling accessory.

Good performance -- Effective waterproofness, the separable rubber gasket can withstand the sliding spacing, resulting in a gapless movement, preventing dust and moisture from bearing, and has good waterproofness.

No lubrication resistance -- There is no resistance to lubrication, the separable rubber gasket has the characteristics of double‑side sliding, which will not increase the resistance to the rotation bearing, and the lubrication is high.

Stable groove sealing -- Groove sealing is strong, and the newly designed end cover greatly improves the sealing performance of the drainage, while reducing the sealing resistance, and the appearance is more high‑end.

Spindle Interface: Square taper.

Replacement for BB-UN26 68 mm bottom bracket shell. Spindle length: 127mm.

Our square taper bottom bracket is suitable for most mountain bike, road racing bike etc.