Harddrive 1-1/8" 137-Tooth Carbon Fiber Rear Belt - Harley Sportster
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.
This Harddrive 1-1/8" 137-tooth rear belt is a carbon fiber reinforced drive belt engineered for high-demand V-twin motorcycle applications. Its synthetic rubber teeth and backing deliver superior strength, low noise, and temperature stability across extreme operating conditions.
Why riders pick this
- Carbon fiber reinforcement for superior strength
- Treated tooth-facing resists punctures and debris
- Synthetic rubber for low noise and temperature stability
- Increased flexibility and width stability
- Made in the USA for V-twin drivetrains
When you demand the best from your V-twin, every component counts. The Harddrive 1-1/8" 137-tooth rear belt is built for performance, featuring a carbon fiber tension member that provides significantly higher strength and durability than traditional aramid belts. This advanced construction ensures your power is transferred efficiently to the ground, offering a more reliable and responsive ride for your Harley-Davidson Sportster.
Engineered for High-Performance V-Twins
- Carbon fiber tension member offers superior strength over aramid alternatives
- Specially treated tooth-facing fabric resists punctures and debris
- Synthetic rubber teeth rated for extreme temperatures, -30°C to +130°C
- Increased flexibility and width stability from synthetic rubber backing
Reliable Upgrade for Harley-Davidson Sportster
This Harddrive rear belt is designed as a high-performance replacement for Harley-Davidson Sportster models that require a 1-1/8" wide, 137-tooth belt. Its robust construction makes it an ideal choice for riders looking for enhanced durability and consistent performance. Always verify the tooth count and width against your bike's original belt to ensure precise fitment and optimal operation.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 21201900
- UPC: 191361537653
- Tooth Count: 137
- Width: 1-1/8 in
- Length: 14 in
- Weight: 3 lbs
- Country of Origin: USA
Common questions
What is the main advantage of this belt over aramid belts?
The carbon fiber tension member provides higher structural strength and durability compared to traditional aramid-type drive belts, resulting in a longer lifespan and more reliable performance under demanding conditions.
Will this belt fit my specific Harley Sportster model?
This belt is designed for Harley Sportster models requiring a 1-1/8" wide, 137-tooth rear belt. Please confirm your bike's original equipment part number and specifications using our Shop by Bike tool before ordering.
Can this belt handle extreme temperature fluctuations?
Yes, the synthetic rubber teeth are rated for a wide temperature range, from -30°C to +130°C, ensuring stable and reliable performance in various riding climates.
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 | Belts |
| SKU | 820-60013 |
| WEIGHT | 3.0 lb |
