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Since you're here, add the front solution too.

  • SumoSprings Part Number SSR-313-40
  • Coil SumoSprings Part Number CSS-1195
Total Price: $504.98

Rear SumoSprings are a maintenance-free suspension enhancement built to create a better journey. Handmade from micro-cellular polyurethane, they are designed to reduce rear-end sag and increase load carrying ability while decreasing vibration, stabilizing sway, and softening harsh rebounds.

The SSR-313-40 has a 1,000 lb capacity when compressed at 50%. The Blue SumoSprings shouldn’t be compressed past 70% of their original height in order to keep full memory rebound.

Craig Keller
2022-10-25 11:00:14

Good product and great tech support

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Customer Reviews

1 ratings for the SSR-313-40
5 out of 5

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Product Specifications

Weight 5 lbs
Dimensions 13.5 × 8.25 × 4.25 in
Application(s) Summary

RAM ProMaster 1500 4 X 2 (2014-2023) ; RAM ProMaster 2500 4 X 2 (2014-2023) ; RAM ProMaster 3500 4 X 2 (2014-2023)

Spring Diameter


Spring Height



1000 (lb) Capacity at 50% Compression