SINGLE SPEED CONVERSION KIT 3/32
The Versatile Performance Single Speed Solution.
The 3/32" Single Speed Conversion Kit is the professional choice for riders looking to strip away the complexity of a geared drivetrain while maintaining compatibility with standard road and mountain bike chains. Unlike the heavier 1/8" BMX-style kits, this 3/32" version is designed to work seamlessly with 7, 8, or 9-speed chains, making it the perfect upgrade for mountain bike "street" builds, cyclocross pit bikes, or lightweight urban commuters.
This kit allows you to convert a standard Shimano-style HG cassette hub into a dedicated single-gear setup. By using a series of precision-machined spacers, you can achieve a laser-straight chain line, which is the most critical factor in preventing chain drops and ensuring a silent, efficient ride.
Key Features
3/32" Performance Cog: Features a slimmer tooth profile specifically engineered for standard 3/32" chains, offering a lighter overall rotating mass than 1/8" alternatives.
HG Hub Compatibility: Designed to slide directly onto Shimano-style Hyperglide (HG) freehub bodies, fitting the vast majority of modern MTB and Road wheelsets.
Precision Spacer Array: Includes a set of anodized aluminum spacers in varying widths, allowing for infinite micro-adjustment of the rear cog's lateral position.
Hardened Steel Construction: The sprocket is stamped from high-strength steel to ensure the teeth resist "hooking" and provide long-term durability under high pedaling torque.
Anti-Drop Tooth Profile: Engineered with a deep-tooth design that offers maximum chain retention, even when riding over rough terrain or vibrating city streets.
Alloy Lockring: Includes a high-tension aluminum lockring to keep the spacer stack tightly compressed, eliminating any unwanted cog movement.
Technical Specifications
| Feature | Specification |
| Cog Width | 3/32" (Standard Narrow) |
| Compatibility | Shimano HG Style Freehubs |
| Material (Cog) | Hardened Heat-Treated Steel |
| Material (Spacers) | Anodized 6061 Aluminum |
| Chain Type | 3/32" Single Speed or 7/8/9-Speed Chains |
| Includes | Rear Cog, Spacer Set, and Lockring |
✅ Why This IS For You
Mountain Bike Conversions: Ideal for riders converting a geared MTB into a lightweight single speed for trail or street use while keeping their existing chain.
Urban & Road Commuters: Perfect for those seeking a low-maintenance setup that is lighter and more aerodynamic than a 1/8" heavy-duty build.
Weight-Conscious Builders: If you want the reliability of a single gear without the extra bulk of BMX-style components.
❌ Why This May NOT be for you
BMX & Heavy-Duty Use: If you are building a bike for heavy park riding or high-impact tricks, you may prefer the thicker 1/8" version for maximum chain strength.
Internal Gear Hubs: This kit is designed for external cassette hubs; it will not work on Sturmey-Archer or Shimano Alfine internally geared hubs.
BFC Pro Tip
When setting up your 3/32" Single Speed Conversion, the "magic" is all in the spacers. Because 3/32" chains have slightly more lateral flex than 1/8" chains, having a perfectly straight chain line is even more important to prevent noise and wear. If you are using a frame with vertical dropouts, we highly recommend pairing this kit with a spring-loaded chain tensioner to ensure your chain stays taut as it stretches over time.
