Maintenance-free micro-cellular urethane helper springs that level sag, reduce sway, and improve control for Ford F-53 chassis motorhomes with a 16,000-18,000 lb. GVWR.
This kit fits Ford F-53 chassis with either the V10 or the newer V8 engine (2011-current) at a 16,000-18,000 lb. GVWR. However, each RV manufacturer designs the coach body to sit on the chassis differently, which can require different mounting brackets even within the same chassis and GVWR class. Some coaches have features that interfere with installation of this kit. Check the frame for any obstruction, and confirm fitment for the specific coach with SuperSteer, before placing an order - 805-745-5553
The SuperSprings SSR-187-40-1 is a SumoSprings Maxim kit built for the rear axle of Ford F-53 chassis motorhomes (used by builders such as Fleetwood, Forest River, Newmar, and Thor) with a GVWR between 16,000 and 18,000 lbs. Each one-piece spring is manufactured from proprietary closed micro-cellular urethane, capturing air inside millions of tiny cells to create a smooth, progressive spring rate without ever needing air lines, compressors, or pressure checks.
The springs attach to the vehicle at both the top and bottom via steel brackets, providing constant support and allowing up to 50% expansion in body height, and work independently from each other to compensate for off-center loads and reduce body roll in turns.
No air lines, compressors, or pressure checks required - ever
Each spring works independently to compensate for off-center loads
Resists oil, salt, and UV damage across a -25°F to 200°F range
Spring bars can be swapped for higher capacity if towing needs change
Installation requires drilling to mount the steel brackets. This kit does not increase the vehicle's GVWR - always stay within the manufacturer's rated GVWR even with these helper springs installed.
SuperSprings also offers the SSR-184-40-1 for the same Ford F-53 chassis fitment, identical in construction and installation but rated for 3,000 lbs. of capacity at 50% compression instead of 2,600 lbs.
• (2) SumoSprings Maxim helper springs • Steel mounting brackets
A: SuperSprings/SuperSteer lists this part as compatible with Ford F-53 chassis using either the V10 or the newer V8 engine (2011-current) at a 16,000-18,000 lb. GVWR, since Ford re-engineered the chassis in late 2020/early 2021 alongside the new 7.3L V8 engine. That said, each RV manufacturer builds its coach body to sit on the chassis differently, which can require different mounting brackets even within the same chassis generation and GVWR class. Confirm fitment for your specific coach (year, make, model, and GVWR) with SuperSteer before ordering.
A: No. SumoSprings helper springs install alongside the factory suspension and sway bar rather than replacing them. They work by cushioning and supporting the existing leaf springs through shackle-mounted urethane blocks.
A: No. This kit improves ride quality, sag, and sway control, but it does not increase the vehicle's rated GVWR. Always stay within the manufacturer's rated GVWR even after installation.
A: Both kits share the same Ford F-53 chassis fitment, construction, and installation process. The SSR-187-40-1 (this listing) is rated for 2,600 lbs. of capacity at 50% compression, while the SSR-184-40-1 is rated for 3,000 lbs. Choose based on how much additional support your coach needs.
A: No. This kit does not fit Thor Outlaw toy hauler applications, even though other Thor motorhomes on a qualifying F-53 chassis and GVWR may be compatible.