Free Shipping on UTV & SXS Spring Kits & Suspension Upgrades
Race -Tested Engineering from California
Rated 4.9 ā
by Real Riders
Rated 5/5 based on 1000+ reviews
SDG Spring Kit | Race-Proven Control for Every Ride
Buy now, pay later with
š SDG Spring Kit ā Race-Proven Control for Every Ride
From racing to the real world.
The SDG Spring Kit transforms your suspension with the same engineering thatās won over 70 championships and 300 race victories. Designed and tested by the Suspension Development Group team in El Cajon, California, each kit delivers measurable gains in ride control, comfort, and reliability ā whether youāre chasing podiums or carving trails on the weekend.
āļø Key Benefits
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Optimized Spring Rates: Balanced for performance and comfort ā sharper turn-in, better small-bump compliance, and reduced body roll.
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Race-Grade Components: Built from high-tensile steel and precision-ground for consistent preload and travel.
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Improved Bottom-Out Resistance: Handles G-outs, jumps, and chop without harshness or fade.
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Set-and-Forget Setup: Each kit includes recommended preload and ride-height specs tailored to your vehicle class and terrain type.
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Serviceable & Upgradeable: Compatible with OEM and aftermarket shocks; engineered for easy future tuning or revalving.
š§ Why SDG
SDG kits are developed using dyno-verified data and real-world telemetry from desert racing, short-course, and prerunner testing.
Every spring rate, crossover, and preload spec is chosen by the same engineers trusted by professional race teams ā so you get track-tested precision in a bolt-on package.
š§ Whatās Included
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Matched front and rear coil springs
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Detailed setup and preload guide
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Optional installation and tuning services through SDGās California HQ
š Technical Highlights
| Feature | SDG Spring Kit | Standard OEM |
|---|---|---|
| Spring Material | High-tensile chrome-silicon | Basic steel |
| Ride Compliance | Plush on chop, firm on hits | Inconsistent |
| Thermal Stability | Race fluid spec, minimal fade | Moderate fade |
| Service Interval | 1 year / 100 hours typical | 6ā12 months |
š¦ Ideal For
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UTV owners upgrading from stock springs
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Racers needing compliant yet controlled travel
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Overlanders carrying gear, passengers, or load weight
Safe & Secure checout
Order today
Receive it on 02/15/2026
- 300 race wins
- 74 championships
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Questions?
Answers here.
What makes SDG spring kits different from stock springs?
SDG spring kits use race-proven dual-rate designs tuned for your exact model. They restore ride height, improve comfort, and eliminate bottom-outs ā the same setups used by championship race teams.
Do bundles qualify for financing?
Yes. SDG offers āRide Now, Pay Laterā financing for all complete systems.
Whatās included in the SDG suspension bundle?
Each bundle includes SDG spring kits, reservoirs, clevis & shaft upgrades, and sway bar or limit strap options ā all tuned to work as one system.
Do SDG spring kits fit both 2-seat and 4-seat models?
Yes. Each kit is vehicle-specific and includes the correct rates and preload setup for 2-seat or 4-seat configurations. Just select your model at checkout.
Do I need to revalve my shocks after installing a spring kit?
Not usually. Our spring kits are tuned to work with stock valving, but a revalve can enhance performance if youāve added major weight like cages or accessories.
What does the SDG reservoir do?
The SDG reservoir increases nitrogen volume and reduces internal pressure buildup. It prevents heat fade, oil foaming, and premature seal wear ā keeping shocks consistent in long desert or dune runs.
What do the SDG clevis and shaft upgrades improve?
They increase durability and smooth travel by using precision-machined materials that resist deflection. Itās a race-grade upgrade for consistent handling.
Do spring hats help ride quality?
Absolutely. By maintaining consistent geometry, they prevent unwanted spring movement and reduce top-out harshness.
Why upgrade the shaft if my stock one isnāt broken?
Stock shafts can flex or score over time. Our race-grade shafts maintain tight tolerances and reduce internal wear ā keeping damping consistent.
Rated 4.9/5 on 
google
Jason was nothing less than awesome in helping me with my shock problem. From taking my phone call directly, listening to my situation, and ultimately hooking me up with the repair I needed he went above and beyond what you would expect. I can honestly say that after my experience at SDG I won't trust anyone else with servicing my shocks.
Jaimes McKinney 
Verified Customer
Verified Customer
These guys are awesome. Tod is such a stand-up guy. Thanks man.
@VFATAL Verified Customer
Amazing customer service! Highly recommended them for UTV shocks
@VFATAL Verified Customer
āProfessional service, Very informative and quick turn around. I test drove my RZR PRO R and it rides awesome š Thanks SDGā
@VFATAL Verified Customer
Best shock tuning in the industry!
@VFATAL Verified Customer
Mucha rapidez en su servicio exelente trato
@VFATAL Verified Customer
