What Spring Rate Do I Need? | Suspension Setup

How to choose spring rates.

Getting your spring rates to a sensible starting point for you car and application is something we all struggle with when starting out. This lesson, taken directly from the Suspension Tuning and Optimisation course, will hopefully help make it a little bit easier for you.

Using a mechanically biased RWD road legal circuit car for the example, Tim runs though the calculations used to work out our spring rates for the front and rear of the car noting along the way some differences in doing so for a race application vs road use.

------------------------------------
0:00 - One Module From A Full Course
0:45 - RWD Circuit Racing Coupe Example
1:21 - Key Information
1:31 - Total Corner Weights or Weight Split From OEM
2:03 - Pro Tip: Unit Consistency
2:25 - Back To Weights
3:00 - Sprung Mass Only
3:48 - Our Example Continued
4:18 - Motion Ratio
5:52 - Purchasable Spring Value
6:10 - Rear Axle
6:50 - Rear Vs Front Frequency Race Use
8:00 - Simplified Calculation
8:45 - Suspension Tuning
9:18 - Lateral Load Video
9:35 - Just One of 37 Modules
------------------------------------
Interested in learning how to do your own wheel alignment for the track or street? Start with a free alignment & suspension 101 lesson now.