Jump to content


Question about bump steer spacers


Recommended Posts

The reason that shortening the strut/spring via the use of shorter springs or strut change causes an issue is that you alter the angular relationship between the control arm and the tie rod from the rack to the wheel hub.

Generally speaking, stock, the front control arm is at a approx 10-15deg angle to the ground as viewed from the front (wheel side lower of course) and the tie rod end follows the same angle. When you shorten the strut, however done, the control arm generally ends up more parallel to the ground. To compensate, you need to put in a spacer to restore the strut to stock length to get your steering geometry back when going over bump (control arm moves up, tie rod does not, result is some steering input you don't want... Overly simplified, its a 3D problem, but I hope you get the gist)

So, after you change out your strut assembly and get the car on the ground and settled (move car back and forth and steer L and R) just look at the control arm. If its more or less parallel with the ground, put the spacer in. If its still angled nicely like stock, don't bother.

In any event, on a street driven car you'll likely never feel the difference either way....

Edited by zKars
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy and Guidelines. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.