Harddrive 1-1/8" Rear Belt - 135t Oe# 40307-00 — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Softail (2000-2006)

Harddrive 1-1/8" rear belt with 135-tooth profile and OE# 40307-00 replacement specification. Built with a carbon fiber reinforced tension member and synthetic rubber teeth designed for strength, low noise, and temperature stability across extreme riding conditions.

Features

• Carbon fiber tension member for higher strength than aramid alternatives
• Treated tooth-facing fabric resists punctures and debris
• Synthetic rubber teeth rated -30°C to +130°C
• Synthetic rubber backing increases flexibility and width stability
• Made in the USA

Specifications

• Brand: Harddrive
• Manufacturer Part #: 21192454
• OE Number: 40307-00
• Tooth Count: 135T
• Width: 1-1/8 in
• Length: 14 in
• Weight: 3 lbs
• UPC: 191361537639
• Country of Origin: USA

Fitment

Fits V-Twin motorcycles requiring OE# 40307-00 rear belt replacement. Confirm your bike's original belt number before ordering to ensure proper fitment.

Frequently Asked Questions

How do I know if this belt fits my bike?

Check your original belt for OE# 40307-00. If it matches, this Harddrive belt is a direct replacement. Consult your service manual if unsure.

What's the advantage of carbon fiber over aramid?

Carbon fiber tension members deliver higher structural strength and better durability under extreme load and temperature swings compared to traditional aramid belts.

Can I use this in cold weather?

Yes — the synthetic rubber compound is rated to -30°C, making it suitable for winter riding without performance loss.

Is this belt made in the USA?

Yes. Harddrive manufactures this belt domestically to OEM specifications.