Gates Polychain Rear Drive Belt For Harley Dyna 1991-1999
Gates Poly Chain: The Carbon Fiber Standard for Evolution Dynas
The Gates Poly Chain® Rear Drive Belt for 1991–1999 Harley-Davidson Dyna models is the most advanced final drive belt ever produced for the Evolution era. While standard belts rely on aramid (Kevlar) cords that can stretch and wear over time, the Poly Chain utilizes Carbon Fiber reinforcement. This ensures that your Super Glide, Low Rider, or Wide Glide benefits from the same technology used in high-output industrial drives and competitive racing.
Patented Carbon Tensile Cord Technology
The heart of the Gates Poly Chain is its carbon fiber cords. This material science breakthrough provides several critical advantages for the V-Twin rider:
- Zero Stretch: Carbon fiber is dimensionally stable. Once the initial tension is set, the belt will not stretch, keeping your rear wheel perfectly aligned and eliminating the need for frequent adjustments.
- 2X the Strength: Offers nearly double the horsepower capacity of standard aftermarket belts, making it essential for 80″ Evo engines with cam, head, or big-bore upgrades.
- Instant Response: The lack of belt “give” results in a more direct connection between the throttle and the rear tire.
Advanced Tooth Profile and Material
Gates engineered the Poly Chain with a precision-molded 14mm pitch tooth profile. The teeth are constructed from a high-modulus polyurethane compound that is virtually immune to tooth shear. Furthermore, the teeth are jacketed in a specialized, low-friction fabric that:
- Reduces Heat: Keeps the belt running cooler for a longer service life.
- Minimizes Noise: Provides a quiet, smooth ride without the high-pitched whine common in lower-quality belts.
- Self-Cleaning: The tooth geometry is designed to help eject road debris and small stones.
Fitment and Specifications (1991–1999)
This 133-tooth belt is a direct “bolt-in” replacement for 5-speed Dyna models:
- Models: FXD (Super Glide), FXDL (Low Rider), FXDWG (Wide Glide), and FXDS-CON (Dyna Convertible).
- Tooth Count: 133 Teeth.
- Width: 1-1/2″ (1.5 inches).
- OEM Cross-Reference: Replaces Harley-Davidson Part #40015-91.
- Origin: Proudly Made in the USA.
Gates Polychain Rear Drive Belt For Harley Dyna
Features
This Gates belt is the same brand of belt used by Harley-Davidson since 1980 due to their reliability
The teeth on the Gates belt has a very slick surface that is easy on the pulleys
The outer surface of the Gates belt is ribbed to help improve flexibility
Belt length is determined by measuring pulley center-to-center
Replaces OEM 40015-90
Made in the USA
| Product Style | AmericanV-twin Item # | Catalog Number | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|---|
| 1 1/2″ x 133 Tooth | 49872 | 600-627 | 3531 | PC-133-1 1/2/PCC-133-1 1/2/PC-133-112 | In Stock: Ships within 24 hours |
This Product Fits
Harley Davidson
Dyna Convertible FXDS 1994-1999
Dyna Glide Custom FXDC 1992
Dyna Glide Daytona FXDB-D 1992
Dyna Glide Sturgis FXDB-S 1991
Dyna Low Rider FXDL/I 1993-1999
Dyna Super Glide FXD/I 1995, 1996, 1997, 1998, 1999
Dyna Super Glide Sport FXDX 1999
Dyna Wide Glide FXDWG/I 1993-1999
