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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:
Installation & Buyer Notice
Professional installation and proper alignment/tensioning are strongly recommended to prevent premature edge wear or belt failure.
Please verify that your current system uses a 3.35" wide, 8mm pitch, 140-tooth belt configuration before ordering.
On Sep 16, 2026 at 08:11:02 PDT, seller added the following information:
