For Popular Go Karts：Fits for Predator 212cc, 196cc, 301cc, 420cc, 6.5hp, 13hp, 15hp, for Yerf-Dog, for Manco, and various go kart models Standard Size for Easy Fit：Axle size: 4-1/2" x 5/8", designed to fit most Go Karts for quick and hassle-free installation Durable Heavy-Duty Metal Construction：Made from high-strength metal for superior durability and high load-bearing capacity, ensuring long-lasting performance Improved Fit & Durability：The steel alloy spindle bracket, with plastic components, helps reduce installation gaps, ensuring a smoother fit and enhanced durability for better control Easy Installation & Professional Support：Simple installation. Confirm compatibility before purchase. Professional after-sales support available