WHEELS MFG A/C BB BSA / 24MM

The Wheels MFG A/C BB BSA / 24mm is a high-performance, workshop-grade bottom bracket engineered to completely eliminate drivetrain creaks and provide an exceptionally smooth pedalling platform. Machined with absolute precision in the USA, this outboard bottom bracket is designed as an elite-level direct replacement for standard, factory-fitted BSA threaded assemblies. By combining robust engineering with a highly serviceable layout, Wheels Manufacturing has created a reliable component that stands up to the worst trail grime and wet road conditions, making it the last bottom bracket assembly your bike will ever need.

The defining benefit of this model is its integration of Enduro Angular Contact (A/C) sealed bearings.While traditional radial bearings only allow three or four internal ball bearings to make contact under a typical pedalling load, Angular Contact architecture ensures that every single ball within the race is actively engaged. This spreads heavy rider force over a vastly larger surface area, drastically decreasing internal friction, reducing mechanical wear, and preventing the premature ovalisation of the bearing race. The military-grade balls are filled with premium Rheolube synthetic grease and shielded by Enduro LLB dual-lip groove seals to guarantee your cranks spin like butter season after season.

Crafted from beautiful, grey-anodised machined aluminium, the outboard cups thread directly into standard ISO/English BSA frame shells.This variant is engineered to match straight 24mm diameter crank spindles, including Shimano Hollowtech II, FSA, and RaceFace EXI setups.The comprehensive kit comes completely packed with high-quality aluminium cup spacers and precision crank spindle spacers, giving you or your mechanic the exact tools needed to dial in a perfect chainline and fine-tune internal preload.

Key Features

• Enduro Angular Contact Bearings: Distributes rider load across all internal balls simultaneously, reducing friction and extending bearing life.

• Premium Machined Aluminium Cups: CNC-machined cups deliver a flawless fit inside threaded frame shells, preventing the structural movement that causes creaking.

• LLB Dual-Lip Silicone Seals: High-performance internal and external silicone dust seals form an impenetrable barrier against water, grit, and mud.

• Fully Serviceable Design: Engineered for long-term ownership, allowing you to easily remove, service, or entirely replace the internal bearings down the track.

• Comprehensive Spacer Pack: Includes an assortment of cup and spindle spacers to help you achieve a perfectly aligned, zero-play drivetrain chainline.

Specifications

Why This IS For You