All you need to know about BB86 Bottom Brackets

How to choose a crankset for a BB86 frame?

BB86 is a press-fit bottom bracket standard. The frame’s shell measures 86.5 mm wide with a 41 mm internal diameter. It supports three main axle types:

• 24 mm axles (Shimano, Rotor 24)
• 30 mm axles (Rotor, THM, Cane Creek…)
• 29 mm DUB axles (SRAM Rival, Force, Red AXS)

The right choice depends on:

• Your current setup: no need to replace a functioning BB.
• Your priorities: weight, stiffness, groupset compatibility.
• Crank length availability: some lengths are brand- or axle-specific.

Are BB86 and BB92 the same?

They share the same 41 mm inner diameter, but differ in width:

• BB86 = 86.5 mm (road)
• BB92 = 91.5–92 mm (MTB)

They are similar but not always interchangeable. Always measure your frame’s shell width. Some BBs are designed to cover both.

How to identify your bottom bracket standard?

1. Check if the BB is press-fit or threaded.
2. Measure the shell width: 68 mm, 86.5 mm, etc.
3. Measure the internal diameter: 41 mm (BB86), 42 mm (BB30), 46 mm (BB386 EVO, BBRight, T47…)

Bottom Bracket Standards Comparison

Tip: BB86 is widely used on road bikes (Ø 41 mm). Always ensure crankset and bottom bracket compatibility.

Can I install a Shimano crankset on a BB86 frame?

Yes. BB86 was developed by Shimano and is sometimes called Press-Fit Shimano. It fits all modern 24 mm Shimano cranks (Ultegra, Dura-Ace…).

However, Shimano cranks are relatively heavy. If weight matters, consider 30 mm alloy or carbon cranks (Rotor, THM…) for better stiffness-to-weight.

Is BB86 compatible with SRAM cranksets?

Yes. Older GXP cranks (24/22 mm) require specific adapters. The most common setup today is BB86 DUB (29 mm axle), perfectly suited for SRAM AXS.

Can I use special crankarms on a BB86 frame?

Yes, with the right BB. A 41/30 BB86 allows boutique cranks with:

• Uncommon lengths (150 mm, 160 mm, 167.5 mm)
• Asymmetrical options (shorter left crank for biomechanics or rehab)

How to choose crank length?

Crank length affects cadence, power and comfort:

• Long cranks: more torque, lower cadence
• Short cranks: higher cadence, faster spin

Ideally, test several lengths before investing in a high-end crankset.

Which brands use BB86?

BB86 is common on road frames from:

• Canyon, Scott, Giant, Merida, Lapierre, Bianchi
• Wilier, Cube, Van Rysel and more

Benefits of BB86

• Allows lighter frames
• Good stiffness-to-weight ratio
• Compatible with various axle standards
• Cost-efficient for manufacturers

Downsides of BB86

• Needs precise frame tolerances
• May creak if not properly installed
• More frequent maintenance vs BSA (regreasing)
• Harder removal without dedicated tools

BB86 vs BSA: Which is better?

It depends. BB86 allows for lighter, stiffer frames, but requires precise installation. BSA is simpler to maintain and quieter long-term.

Example: Canyon Aeroad (BB86) vs Specialized Tarmac SL8 (BSA). Frame design quality matters more than the BB standard itself.