Your Shocks Aren’t Making Your Suspension Stiffer
You’ve probably heard it: “Get stiffer shocks and the car will be tighter.”
It feels true. You turn up the damping, the car feels planted, and you assume the suspension is now harder.
It’s not. You’re confusing two completely different things.
Spring rate makes the suspension hard. Damping controls the speed of weight transfer.
Here’s why that distinction matters.
What your spring does
Your spring resists load. Directly. If you have a 35 N/mm spring, that means for every millimetre the suspension compresses under load, you need 35 newtons of force.
That’s stiffness. That’s what makes the suspension “hard.”
Increase spring rate to 40 N/mm, and the car resists load more — the suspension compresses less under cornering. The car sits higher. Weight transfer happens through a narrower range.
That is making the suspension objectively stiffer.
What your shock absorber does
Your shock doesn’t resist load. It resists motion.
Turn up the damping and you’re telling the shock: “Slow down how fast this suspension moves.”
The spring still wants to compress the same amount. The load is still the same. But the shock delays that motion — it stretches the weight transfer over time instead of letting it happen instantly.
This is not the same as changing spring rate.
Why it matters on track
Here’s where it bites you:
You feel the car dive under braking and think “I need stiffer shocks.” You turn up the damping. The dive feels slower — more controlled. So you think it’s working.
But you haven’t actually changed how much the car dives. You’ve just made it dive more slowly.
If the problem is how much the car moves (dive depth, roll angle), that’s a spring rate problem. More damping won’t fix it — it’ll just slow down the problem.
If the problem is how fast the car moves (abrupt weight transfer, unsettled handling), damping might help. But only if you’re using enough spring rate first.
You can’t dampen away a soft spring.
The practical test
Here’s how to tell if you need to adjust shocks or springs:
• Does the car feel like it’s sitting too deep in corners? Spring rate problem.
• Does the car transfer weight abruptly, then oscillate? Damping problem.
• Does the car refuse to settle after corner entry? Usually damping — but check spring rate first.
Chapter 9 goes into the maths, but the concept is simple: spring sets the workload, damping controls the rhythm.
Get the spring right first. Then tune damping.
Want the full physics?
Chapter 9 of the Oval Racing Masterclass
breaks down spring rate, motion ratio, and how to calculate
your optimal damping window. Find it here