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Thuren's soft-rate coil springs are the perfect blend of a soft ride, high performance, and great control. Resist buying into the Progressive or Multi rate fancy name hype, as these are single rate LINEAR coils for a reason. Ask around and you'll find these are the best riding highest quality coils you can get. Progressive and multirate coils DO have their place, as long as space constraints and suspension travel numbers can work together. Working with what Dodge gave us, we find that linear rate coils function and ride the best!
Starting in 2013 on the radius arm platform, Ram decided to design the front coil spring mounts at an angle. This presents some issues with the coils design, as the coil has a very hard time standing straight without a massive bend in the coil, when loaded. This might be why the OEM coils are so stiff. Stiff coils will bend less. Regardless, with some tricky engineering we were able to combat the angled seats, and design a coil which stands very straight installed.
2500 trucks with coil springs in the rear have a 2.75"-2.8" rake so our 2.75" coils will put the truck dead level, this can make the truck look a little taller in the front then the rear. On the 3500 trucks they have a 2.25"-2.3" rake so the 2.25" coils will put them dead level again possibly making it appear slightly taller in the front due to the body design.
Be sure you read our BUILDING YOUR SUSPENSION section here, regarding our coil spring heights. There are different weight trucks out there, so be sure you know what lift height you are really going to get.
Sold per pair and 100% made in the USA.
If not purchasing our shocks to work with these coils, please contact us to make sure your shocks will function properly. Even aftermarket shocks by application for a leveling kit with stock coils, will not work properly, as they are much too short extended and the damping rates are way off.
The 3500 Rams come 1/2" taller than the 2500 from the factory, which is the reason for the height difference.
Each 5160 alloy spring is fully CNC computer formed and tested, using the most high-tech manufacturing processes.
26% softer than the ultra-stiff OEM coils, while designed to still use factory compression/bump travel. No bump drops needed.
No radius arm drops required, being that these coils are designed around the OEM bump travel constraints.
Proven Linear rate design, just like all of our other coils, to prevent inconsistent feel through the range of motion.
Thuren fabrication part number: TF-RAFC-13UP