Description
Product Overview
The iFJF GMRCK25D Timbren SES (Suspension Enhancement System) is the ultimate rear suspension upgrade for 2011-2019 Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD. Timbren patented hollow rubber springs deliver progressive spring rate increasing support as load increases eliminating rear sag, reducing body roll, and improving stability when towing. No air bags, no compressors, no maintenance just bolt-on performance.
Key Features
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Progressive Spring Rate: Hollow rubber Aeon springs provide soft unloaded ride, progressively stiffening as load increases.
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Zero Maintenance: No compressors, airlines, or air pressure adjustments. Install once and forget.
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Heavy-Duty Capacity: Handles fifth-wheel towing, gooseneck trailers, heavy payloads, commercial use.
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Bolt-On Install: No drilling on most applications. 1-2 hours with basic hand tools.
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Made in North America: Premium materials for long-term durability in all weather.
Compatibility
| Make |
Model |
Years |
| Chevrolet |
Silverado 2500/3500 HD |
2011-2019 |
| GMC |
Sierra 2500/3500 HD |
2011-2019 |
Timbren SES vs Air Bags
| Feature |
Timbren SES |
Air Bags |
| Installation |
Bolt-on 1-2 hrs |
Complex 3-6 hrs |
| Maintenance |
None |
Regular checks, leak repairs |
| Cold Weather |
No effect |
Lines can freeze |
| Cost Over Lifetime |
One-time |
System + repairs + compressor |
Frequently Asked Questions
Q: Will this fit a 2015 Silverado 2500HD with 5th wheel prep?
A: Yes! Compatible with factory fifth-wheel/gooseneck prep packages. Springs mount to axle/frame independently.
Q: How does unloaded ride compare to stock?
A: Approximately 1 inch clearance when unloaded preserves factory ride quality. Springs only engage with load.
Q: Do I need to remove them for winter?
A: No Timbren springs are unaffected by cold weather. No air lines to freeze, no pressure to check.
Related Guides & Resources
