Designed for Class A motorhomes built on the Ford F53 4x2 chassis, the SumoSprings Front & Rear Kit (K-10-001) delivers superior load support, improved stability, and a smoother ride for heavier RV applications. This complete suspension upgrade is ideal for motorhomes from Fleetwood, Forest River, Newmar, and Thor, helping drivers stay in control and comfortable on every mile. SumoSprings are a patented suspension enhancement engineered to engage progressively as weight is applied. Made from proprietary closed micro-cellular urethane, they provide excellent damping to reduce sway, body roll, and front-end dive. Unlike air suspension systems, SumoSprings are maintenance-free, never leak, and require no air lines or compressors. This perfectly matched combo kit includes a front kit (SSF-170-40-2) and rear kit (SSR-187-54-1), ensuring balanced performance and consistent handling across the entire vehicle. Feature List:• Custom fit for Ford F53 4x2 chassis (2011â2025)• Designed for 20Kâ22K GVWR Class A motorhomes• Includes matched front and rear SumoSpring kits• Progressive spring rate for smooth, controlled engagement• Proprietary closed micro-cellular urethane construction• Maintenance-free design no air lines or compressors• Improves stability, handling, and ride comfort• 10, 000 lb load support capacityAdditional Info: Weight: 68 lbsDimensions: 25 x 19 x 10 inApplication(s) Summary: Ford F53 4 X 2 (2011-2025); 20k-22k / Fleetwood; Forest River; Newmar; ThorCapacity: 10000 (lbs) Improves handling under heavy loads Boosts driver confidence & control Eliminates air system maintenance & failures | Supersprings International Inc SumoSprings Front & Rear Kit Ford F53 20-22K - Fleetwood; Forest River; Newmar; Thor - K-10-001