Harddrive 1-1/8" Rear Belt - 139t Oe# 40024-04 — Harley-Davidson Road King, Road King Classic, Road King Custom (2004-2006)

Harddrive 1-1/8" rear belt with 139 teeth, engineered with carbon fiber reinforcement for V-Twin motorcycle drive lines. Built to withstand extreme load and heat while minimizing noise and belt slip.

Features

• Carbon fiber tension member for high-strength performance
• Specially treated tooth facing resists punctures and debris
• Synthetic rubber teeth rated -30°C to +130°C
• Synthetic rubber backing improves flexibility and width stability
• Made in the USA

Specifications

• Brand: Harddrive
• Manufacturer Part #: 21192456
• UPC: 191361537660
• Tooth Count: 139
• Length: 14 in
• Width: 14 in
• Weight: 3 lbs

Fitment

Designed for V-Twin motorcycle drive lines requiring high-strength, low-slip performance. Verify OEM part number 40024-04 compatibility with your specific model before ordering.

Frequently Asked Questions

What makes this belt different from standard Aramid belts?

Carbon fiber tension member provides superior strength compared to Aramid-type products, with better performance under extreme load.

Will this belt work in cold weather?

Yes — synthetic rubber construction is rated from -30°C to +130°C, suitable for harsh climates.

Is this belt made in the USA?

Yes — manufactured in the USA.

How do I know if this is the correct belt for my bike?

Cross-reference your bike's OEM belt part number (40024-04) with this 139-tooth, 1-1/8" width belt. Contact us if you're unsure.