Smoother ride in the rear
"Pretty easy install. Makes the ride so much smoother in the rear. Highly recommend!"
Cummins
Shop All
SKU #: SUL-SA-06F
MPN #: SA-06F
Sulastic Rear Leaf Spring Shackles 17-20 Ford F-250 / F-350 / F-450
Description
Truck owners are well aware of the rough ride their heavy duty trucks have, especially when they have an empty bed. However, there is a solution: Sulastic Rubber Spring Shackles. These shackles contain a rubber spring to provide an elastic suspension that effectively minimizes or eliminates the vibrations and sudden shocks caused by leaf springs. By doing so, they also enhance safety and overall handling. Importantly, these rubber springs do not compromise the truck's load-carrying capacity, and the ride height remains nearly the same as the stock height, deviating by no more than a quarter inch. Enjoy a smoother ride and stop your truck from bouncing around by installing Sulastic Rubber Spring Shackles today.
Enter your zip and we'll see if installation is available.
- Request quotes from local installers at checkout
- Compare options and choose the best fit for your install
About WrenchConnected
WrenchConnected is an independent installation marketplace operating in partnership with Diesel Power Products.
How it works
After checkout, we route your vehicle info and part SKU to verified installation shops near you. Local installers review the job and submit competitive bids; you pick the shop you want based on price, reviews, and availability. Your name and email stay private until you select an installer.
Pricing
You pay for the bid from your preferred shop. The full amount is shown before you confirm — installers cannot add charges without your written consent. Payments are processed securely by Stripe.
Your privacy
During bidding, shops see only your service ZIP code, vehicle year/make/model, and the part SKU — not your name, email, or address. Only the shop you select receives your contact details after payment. We never sell your personal information.
More detail at wrenchconnected.com.
FEATURES & BENEFITS:
- Smooths out the ride by just replacing the OEM shackles
- Reduce Vibration and Shocks
- Stops the Bed Bouncing
- Improve Stability
- Reduce Braking Distance
- Load & Towing Capacity Not Affected
- Improves Handling and Control of the Vehicle
- Set includes 2 shackles
About Sulastic Rubber Springs
If you're looking to drastically reduce vibrations and increase the stability of your vehicle in a simple, easy bolt on part, then Sulastic is exactly what you've been looking for. Sulastic rubber springs simply replace the rigid factory shackles with a compressible unit that will flex and absorb the harshness of the road surface.
Blog
June 12, 2026
The diesel particulate filter (DPF) on your Cummins engine traps soot before it leaves the tailpipe. Over...
Read MoreCummins DPF Cleaning: Signs, Methods & Tips
June 12, 2026
P2509 flags when your Cummins ECM isn't seeing stable voltage coming from the battery and charging system....
Read MoreP2509 Cummins Code: Causes, Symptoms & Fixes
June 10, 2026
It starts small. Maybe the truck is a little slower to spool than usual. Maybe it sounds...
Read MoreHow to Find a Boost Leak Without Special Tools
June 05, 2026
Your exhaust system moves spent gases out of the engine and away from the cab. The muffler...
Read MoreResonator vs Muffler: Key Differences Explained
Overall rating: 4.6666665 / 5 from 3 reviews.
AI Generated Review Summary
Summary topics
Review topics: [].
Review highlights
Reviews
Smoothes Out Ride
"1 1/2 - 2 hrs to install. Smoothes out the ride better than high dollar shocks. Especially over speed bumps and pot holes. No more bone jarring speed bumps!"
Much better
"It wasn't as drastic of a change as I expected but it definitely rides much better. It does a good job of taking away the harsh gut punch from things like speed bumps. I also have Timbren springs for towing so maybe that is taking away some of the plushness. I would still recommend the Sulastic Shackles and the install is fairly easy if you have the tools."
Q&A
- Can they lower rear down 1.5 in?
- These retain the same height has factory, they would not lift or lower the truck.