10 Best Bottom Bracket of December 2025

• Square taper interface
• Sealed no service bearings
• Plastic left cup
• Shimano Reference Number: BB-UN26

SHIMANO

• Mtb
• Hollowtech II
• 2 items

SHIMANO

• ★【Sturdy and durable】The bottom bracket is sturdy and durable, with long service life. Suitable for 68mm frame shell. Please confirm the size before purchasing.
• ★【Safety】 The steel shell can absorb fillet tolerances and is used to install the bottom hole of the bracket. For safety, please use the BB tool to install and replace the bottom bracket.
• ★【Lightweight】The integrated system can protect the frame and output more power, which is better than the underframe of ordinary structure. The weight is very light and will not bring additional burden to the bicycle.
• ★【Fine workmanship】Fine workmanship, can better connect the precision thread, 2 bearing structure makes the spindle more flexible and lower labor intensity.
• ★【Guarantee】 If you have any questions about our products, please send us an email, we will reply you within 24 hours. Thank you for your interest in our products.

VGEBY1

• Forged and CNC Machined Alloy Cups, English External Threaded BSA1.37"x24T
• Fits 68 or 73-millimeter bracket shells and 24mm Crankset Spindle Shaft Diameter
• Premium Sealed Cartridge Bearings with Nylon bearing seals for Superior protection and contact with crankset spindle
• Suitable for all bicycle styles of riding, Road, Mountain Bike, BMX

QiK Sports

• Fits JIS square-taper cranksets
• Spindle Length: 113
• BB Shell Width (mm): 68 mm
• Bottom Bracket Shell I.D.: 1.37
• Crankarm fixing bolts sold separately

SHIMANO

• 14 g lighter than SM-BB6700
• smoother than SM-BB6700 (50 % less friction)
• small ball bearings keep weight low
• bearing cups anodized
• recommended for Ultegra FC-R8000, FC-6800, 105 FC-5800, Metrea FC-U5000, FC-CX70

SHIMANO

• 072774171286

Sunlite

• Frame Interface - For mountain and road bikes with English threading.
• Shell Width - Fits 68 or 73-millimeter bracket shells. Comes with spacers for 73mm.
• Cranksets - Bottom brackets are interchangeable between SRAM and Truvativ cranksets but can only be installed with SRAM cranks.
• Gutter Seal Technology - Drastically improves sealing against the elements while reducing seal drag and friction.
• GXP Technology - Gutter seal design cuts friction, durability and weight - improving both feel and performance.

SRAM

• Fits JIS square-taper cranksets
• Crankarm fixing bolts sold separately
• Hollow spindle
• 50mm chainline

SHIMANO

• 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.
• The steel shell can absorb roundness tolerance for installing ports of Bracket Bottom.
• Integrated system can protect the frame, more power output, its better than ordinary structure bottom bracket.

Yuehuam