The Wheels MFG 24mm BB Spacer 1mm is a highly accurate, workshop-grade small part designed to achieve a perfect fit and flawless alignment across modern bicycle drivetrains. Proudly manufactured by Wheels Manufacturing, an industry leader based in the USA, this individual 1.0mm component is the go-to solution for professional bike mechanics and discerning home tinkerers alike. When installing a fresh crankset or migrating gear between different frames, tiny manufacturing variances can frequently lead to annoying axle play or a sub-optimal chainline. This precision-cut spindle spacer fills those fractional gaps seamlessly, ensuring your bike runs silently and efficiently.
Crafted entirely from engineering-grade Delrin, this spacer stands out from cheap, flimsy plastic alternatives. Delrin is an exceptionally tough, high-density thermoplastic chosen specifically for its self-lubricating qualities, extreme dimensional stability under compression, and high resistance to environmental factors like grease and mud. It is designed to slide directly over any standard 24mm diameter crank spindle—such as Shimano Hollowtech II, FSA, or the drive side of a SRAM GXP system. By positioning the spacer between the crank arm and the external bottom bracket dust seals, it lets you finely tune the lateral preload, stopping side-to-side axle walking without binding the bearings.
In addition to removing crank slack, this 1mm spacer plays an essential role in fine-tuning your bike's drivetrain efficiency. Shifting a front chainring outwards by a single millimetre can drastically improve gear tracking on modern multi-gear rear cassettes, reducing drivetrain drag and silencing cross-chain noise in extreme gears. Sold individually, it allows riders to buy exactly what they need for a quick garage fix or a custom frame buildup. It integrates seamlessly into press-fit and threaded systems alike, including BB30, PF30, BB86, and BB92 conversion bottom brackets, making it a highly versatile addition to any tool kit.
Engineering-Grade Delrin Construction: Machined from ultra-durable Delrin thermoplastic, offering high impact resistance and low internal friction.
Precise 1.0mm Thickness: Measures exactly 1mm wide, allowing for highly predictable, micro-adjusted spacing to rectify side-to-side crank arm play.
Universal 24mm Internal Diameter: Designed to slide perfectly onto standard 24mm crank spindles, including Shimano Hollowtech II, FSA, and SRAM GXP.
Optimises Drivetrain Chainline: Helps shift the crank arm outboard slightly to correct poor alignment, reducing chain wear and silencing gear setups.
High Chemical and Wear Resistance: Built to survive continuous exposure to aggressive bicycle degreasers, moisture, and high-pressure washing.
| Attribute | Specification |
| Internal Diameter (ID) | 24mm |
| Thickness | 1.0mm |
| Material | Engineering-grade Delrin |
| Compatibility | Shimano Hollowtech II, FSA 24mm, SRAM GXP (Drive Side) |
| Bottom Bracket Fitment | BB30, PF30, BB86, BB92, BSA Threaded (with 24mm adaptors) |
| Quantity | Sold individually (1 spacer) |
| Origin | Made in the USA |
