Mitsuboshi 4LK530A V-Belt Super KB 4LK530 0.5" W x 53" L Gray Rubber 5/16" H The Mitsuboshi 4LK530A Super KB V-belt is a premium fractional horsepower (FHP) belt engineered for demanding applications in riding mowers and similar outdoor power equipment. Measuring 53 inches in effective length with a 0.5-inch top width and 5/16-inch height, it features a reinforced rubber construction with high-modulus tensile cords that resist stretching, slipping, and premature failure under heavy shock loads. Designed for severe operating conditions, the Super KB series delivers superior durability, heat resistance, and power transmission compared to standard FHP belts. Its gray rubber compound offers excellent flexibility and oil resistance, ensuring consistent performance in variable temperatures and grassy, debris-filled environments typical of lawn care machinery. Features - 53-inch effective length, 0.5-inch top width, 5/16-inch height (4LK profile) - Reinforced rubber construction with high-strength tensile cords for shock-load resistance - Super KB series designed for severe-duty applications in riding mowers - Resists stretching, cracking, and heat degradation under heavy use - Oil- and abrasion-resistant rubber compound for extended service life - Precision-engineered for smooth, quiet operation and reliable power transfer - Compatible with OEM and aftermarket riding mower drive systems - Sleeve packaging protects belt during storage and handling - Ideal replacement for belts exposed to frequent start-stop cycles and high torque - Trusted Mitsuboshi quality for agricultural, lawn, and garden equipment Specifications - Brand Name: Mitsuboshi - Model Name: Mitsuboshi 4LK530A - Part Number: 4LK530A - Sub Brand: Super KB 4LK530 - Product Type: V-Belt - Type: 4LK - Material: Rubber - Color: Gray - Length: 53 in - Width: 0.5 in (1/2 in) - Belt Height: 5/16 in - Thickness: 5/16 in - Used with Equipment Type: Riding Mowers - Each Weight: 0.3 lb - Packaging Type: Sleeve - Country of Origin: Japan - UPC: 034494545303 - Manufacturer: MBL USA (Mitsuboshi Belting Ltd.) Product Application This V-belt is used by homeowners, landscapers, and small-engine repair technicians as a high-performance replacement in residential and commercial riding mowers where standard belts fail prematurely due to heavy grass, inclines, or frequent use. It is commonly installed on the primary or secondary drive system of brands such as John Deere, Husqvarna, Cub Cadet, and Toro?transferring engine power to the cutting deck or transmission with minimal slippage. The Super KB construction withstands the vibration, heat, and intermittent high-torque demands of lawn care, reducing downtime and maintenance costs. Its precise dimensional tolerances ensure proper tension and alignment, delivering smooth cutting performance and extended belt life in challenging seasonal conditions.