Gilmer Belt 255-L-100 25.5in x 1in

The Gilmer Belt 255-L-100 25.5in x 1in is a precision synchronous drive belt engineered for high-performance automotive and industrial applications where reliable power transmission is non-negotiable. This belt is purpose-built for engine builders, hot rodders, and mechanics working on custom engine packages, supercharger installations, and serpentine belt conversions. The Gilmer tooth profile eliminates slip and belt creep, making it essential for applications requiring exact belt tension and repeatable performance across wide RPM ranges and varying load conditions.

The Gilmer Belt 255-L-100 features a 1-inch width and 25.5-inch length with evenly spaced synchronous teeth that mate precisely with Gilmer pulleys, ensuring zero slippage and positive engagement under acceleration and deceleration. The 255-L designation indicates a 5mm tooth pitch (L-section standard), which is the metric equivalent of 3/8-inch pitch and widely recognized in performance automotive circles. Peterson Fluid's manufacturing tolerances and belt construction deliver consistent performance across temperature extremes, from cold engine starts to sustained high-temperature operation during extended track sessions or heavy-duty use.

Mechanics and engine builders favor the Gilmer Belt 255-L-100 for serpentine system upgrades, water pump drives, and alternator circuits on modified engines where OEM V-belts cannot handle increased horsepower or reliability demands. The 1-inch width provides ample load-carrying capacity for small-block and mid-size engine applications, while the compact 25.5-inch length suits tight engine bay configurations common in vintage hot rods and modern performance builds. Proper installation requires Gilmer-profile pulleys; verify pulley compatibility and maintain correct belt tension per application specifications to maximize belt lifespan and prevent premature wear.