Spring Smasher
Your coilover on a spring rater, in software. Build it from part dimensions (springs, lockout nut, bump stop and gas) and see the load at every inch of travel before you touch the rater.
Everything on the rater, nothing to bolt up
Single or stacked springs
A lockout nut above or below the slider, with the gap you set. See where the stack locks out and the rate it runs after.
Bump stops where they really touch
Exposed shaft and packer set the touch point. Penske bump stops plus the RE Suspension cross-reference stacks for Bilstein, Ohlins and more.
Gas force included
Shock gas pressure and shaft diameter add their load, or leave it off to see the springs alone.
Linear or measured rates
Type a rate, or enter a spring's load table from your own rater for progressive springs.
443 stock springs built in
Bilstein, Swift, Landrum and Eibach, as the makers publish them. Pick by free length and rate.
Your own parts
Save the springs and bump stops you measured once, then pick them in any setup. Keep them in a file and share them.
Target fit
Type the loads you want at each travel. It finds the top nut, stop nut and packer that come closest, or opens up to the springs and bump stops in the library and shows the best answers side by side.
Compare up to 4 setups
Lay setups over each other on one graph, load or rate against travel or eye-to-eye length.
Save and share setups
Setups save on your device and as files you can text or email to your crew.
Phone or computer
Runs in the browser. Nothing to install, the same tool in the trailer and at the desk.
Smash it in the trailer
Run the test, step through the travel with the slider, or jump straight to a length or a load. The rater display reads load, length and travel as you go.
Free while in testing
The Spring Smasher is open to everyone while we test it. Pricing and purchasing open at launch.