Harley Dyna 3.35\" Ultima Open Primary Belt 8mm 140T Replacement 58903 For Sale - New and Used

Product Overview

Replace your worn or damaged open primary belt with this High-Performance 3.35\" Replacement Belt. Specifically engineered for Ultima open primary drive systems, this 8mm pitch, 140-tooth belt delivers maximum strength, high-torque handling, and long-lasting reliability for custom builds and Harley-Davidson cruisers.

Part Details

• Part Number: 58-903 (Ultima Equivalent)

• Belt Style: 3.35\" Open Primary Drive Belt

• Pitch & Teeth: 8mm Pitch, 140 Teeth

• Package Includes: 1 x Open Primary Drive Belt

Key Features

• Heavy-Duty Construction: Manufactured from high-grade, reinforced rubber compounds with high-tensile cords designed to withstand extreme horsepower and torque without stretching or snapping.

• Exact Compatibility: Engineered to match exact dimensions for seamless integration with 3.35\" Ultima open primary kits and custom primary pulleys.

• Enhanced Durability: Built to resist wear, heat buildup, and debris exposure common in exposed open-belt drive setups.

Vehicle Compatibility

Designed for use with Ultima 3.35\" Open Belt Drive Kits on the following applications. Please verify your system type and tooth count before purchasing:

• Custom Chopper / Bobber: (Equipped with Ultima 3.35\" Open Belt Drive Kit)

Installation & Buyer Notice

• Please verify that your current system uses a 3.35\" wide, 8mm pitch, 140-tooth belt configuration before ordering.

On Sep 16, 2026 at 07:20:58 PDT, seller added the following information:

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