Harddrive Rear Steel Sprocket - 51 Tooth Flat Black - Harley & Indian V-Twin
About Harddrive
Harddrive is the house performance and replacement line built for American V-twins, covering everything from engine hardware and electrical to controls, lighting and chassis parts. The range is aimed squarely at Harley-Davidson and Indian riders who want a direct-fit part without dealer pricing, and it spans decades of model years — from Evolution-era Softails to current Milwaukee-Eight baggers.
Optimize your V-twin's chain drive conversion with the Harddrive Rear Steel Sprocket. This 51-tooth flat design is precision-engineered for motorcycles transitioning to a 530 chain, delivering robust performance and lasting durability.
Why riders pick this
- 51-tooth count for precise gearing
- CNC machined carbon steel construction
- Hardened for maximum wear resistance
- Flat profile for 530 chain conversion
- Black zinc passivation finish
- Universal hub adapter for V-twin compatibility
When performance and reliability are paramount for your chain drive conversion, the Harddrive 51-tooth steel sprocket stands ready. CNC machined from rugged carbon steel and then hardened, this sprocket is built to withstand the demands of aggressive riding and high-horsepower V-twin engines. Its flat profile ensures perfect compatibility with 530 size chains, while the black zinc passivation coating provides excellent corrosion resistance and a sleek, understated aesthetic that complements any custom build.
Uncompromising Strength for Chain Drive
- 51-tooth count for tailored gearing
- CNC machined from high-strength carbon steel
- Hardened for superior impact and wear resistance
- Flat profile specifically for 530 chain conversions
- Black zinc passivation coating for lasting protection
- Universal hub adapter fits 1984-2022 Harley & Indian hubs
Essential for Custom Builds
This Harddrive sprocket is an essential component for any serious chain conversion. The included universal hub adapter ring ensures broad compatibility with both 1984–1999 and 2000–2022 Harley-Davidson and Indian Motorcycle wheel hubs, simplifying your build. Whether you're fine-tuning your gearing for the track or simply prefer the mechanical advantages of a chain over a belt, this sprocket provides the foundation for a high-performance drivetrain. Always confirm the correct tooth count for your specific application.
Specifications
- Brand: Harddrive
- Manufacturer Part #: RFE-7080_WPS:51-BLK
- UPC: 191361510885
- Tooth Count: 51
- Weight: 2.5 lbs
- Dimensions: 12 in L × 12 in W × 0.5 in H
- Finish: Black zinc passivation coating
- Country of Origin: Poland
Common questions
Will this fit my Harley or Indian straight out of the box?
The sprocket includes a hub adapter ring compatible with 1984–1999 and 2000–2022 hubs, making it suitable for a wide range of V-twin models undergoing a 530 chain conversion.
What is the purpose of the 'flat' profile?
The flat profile is specifically designed to work optimally with 530 size motorcycle drive chains, ensuring proper alignment and engagement during a belt-to-chain conversion.
Is this sprocket durable enough for high-performance applications?
Yes, this sprocket is CNC machined from carbon steel and hardened for excellent impact and wear resistance, making it suitable for demanding, high-performance V-twin builds.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Harddrive |
| TYPE | Sprockets |
| SKU | 820-51612 |
| WEIGHT | 2.5 lb |
