Best Steel 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

COMPATIBILITY I: compatible with Shimano 16-Notch X 44mm: Fits 16-notch, 44mm diameter external bearing bottom bracket cups including for Shimano Hollowtech II, Campagnolo Ultra-Torque and Power Torque, Race Face X-type, FSA MegaExo, SRAM/Truvativ GXP, Chris King, and Phil Wood outboard bearing. compatible with Shimano BB80, BB5700, XT BB70, BB51, and previous external bearing threaded cups. Also fits disc brake rotor lockrings with 16 external notches.

COMPATIBILITY II: Fits 16-notch, 49mm diameter external bearing bottom bracket cups including FSA Mega Evo, Wheels Manufacturing PF30, Wheels Manufacturing T47, GUB BB386, and others. NOTE: It will be compatible with Shimano TL-FC24 and TL-FC25 adapters.

EXTRA LONG HANDLE: It provides better leverage to remove really tough bottom brackets, and the non-slip rubber grip offers stronger friction for ease of use.

Fits JIS square-taper cranksets

Crankarm fixing bolts sold separately

Hollow spindle

Compatible with 1/2" pedals

Forged steel

24 TPI

【Compatible With】Work for 68mm BSA bike thread bottom. Compatible with Shimano BB-UN26/BB-100/BB-101/BB-300.Please purchase according to the original length, the length error is applicable within 2mm.108/110/113/116/118/122.5/127mm for choose.

【Superb Material】High class quality,the bottom bracket is solid and durable with a long service time.Sealed bearing assembly provide better sealing and lubrication performance.

【Protect Bike Frame】Integrated System of this square taper bottom bracket can protect the frame, more power output, it's better than ordinary structure bottom bracket. The weight is very light and does not impose an extra burden on the bicycle.

Sealed cartridge

Bearings & cups for one-piece cranks

68mm bottom bracket shell width compatible

24 TPI Treads

Product Type: OUTDOOR_RECREATION_PRODUCT

Package quantity: 1

No batteries required

【Dimensions and specifications】:OUTER DIAMETER: 1.74 inch/44.5, INNER DIAMETER: 1.28 inch/32.5mm, BALL DIAMETER: 5/16 inch. Please confirm whether this size is suitable for your bicycle before you buy them!!!!!!!!!!!!!!

【Application:】: This kind of ball bearing stainless steel ball inlaid in the retainer design,It is a bicycle parts, it's suitable for replacing the crank bearing of the bicycle.

【Material】: This ball bearing retainer made of steel, high quality, durable and high intensity.

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.

Fits JIS square-taper cranksets

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

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.

The bottom bracket is solid and durable with a long service time. Suitable for 68mm frame shell. Please confirm the size before purchase.

The steel shell can absorb roundness tolerance for installing ports of Bracket Bottom. Please use the BB tool to install and replace the bottom bracket for safety.

Integrated System can protect the frame, more power output, it's better than ordinary structure bottom bracket. The weight is very light and does not impose an extra burden on the bicycle.

High Class Quality: Boenoea bottom bracket with steel shell is solid and durable with a long service time, works excellent, the ease of operation, the use safe reliable.

Sealed Bearing Design: Waterproof, dust bearing and maintenance-free sealed cartridge bearing design, which can help to prevent the erosion of sediment water, dirt, mud.

Easy to Install: Two Bearings precision thread design to better connect with the arm of the bike. Help you fast and easy installation without adjustment.

Material: [cups] aluminum, [bearings] steel

Shell Type: BSA

Shell Width: 68/73mm

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.

Package length: 14.478 cm

Package width: 5.334 cm

Package height: 5.334 cm

【Functionality Rides High】TRiPEAK steel bearings offer extreme durability and high performance efficiency, specially for off-road rides. Waterproof, dustproof, and efficient BB keeps the wheels rolling for miles and miles before you ever stop.

【Shell Width】Fits 68/73mm English (BSA) bracket shells, interchangeable between SHIMANO BBR-60, BBR-9100, ROTOR BB1 Road, CeramicSpeed BSA, FSA BB-6000 MegaExo and more with significantly less friction.

【Crankset Compatibility】Fits 24mm spindles, 100% compatible with SHIMANO DURA-ACE, TIAGRA, ULTEGRA, GRX, 105 HOLLOWTECH II, FSA MegaExo, ROTOR ALDHU/3D/3D24, RaceFace EXI crankset series, etc.

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

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

Package Includes 1pcs Square Taper Bottom Bracket.

2" Cup Bottom Bracket Set,One-Piece Bottom Bracket Cup Set Bearings Included,Silver

Fits on most bikes such as beach cruiser, lowrider,chopper bike frames

For one-piece crank ,Material: steel

Nylon fiber cups on both sides

Silver CrMo hollow axle

110.5/115/119/122.5/127.5/131mm available

BB30 Bottom Bracket Bearings

Lifetime Warranty

Direct Replacement for both BB30 and PF30 Press Fit Bearings

American style BB for older three piece cranks

American BB for 3-piece cranksets

Fits 68mm American frames

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).

WANT THE LIGHTEST or CERAMIC MODEL? See the full TITANIUM & CERAMIC version link at bottom.

CRANKSET FIT: SHIMANO and other JIS 2.0° Degree Square Taper type

SUPER SMOOTH PREMIUM BEARINGS: Premium ABEC 5 standard, Grade 5 Chromium Steel Balls, and polished 52100 High Carbon Chromium alloy races sealed with X-SEALS. Extremely close tolerances for I.D. and O.D., roundness of ball, trueness of the races and micro surface finishes of balls and races.