Wheel alignment specifications

[ButterSmooth]

Lots of things effect that. Load weight, spring rates to name two. We adjust to 3/4 to 1 1/4 toe in measured at 120" between targets. Which end of that range we shoot for depends on load and spring rate.

So that would be -.5°±.12°. BMW specifies that wheel alignment be done with the driver in his seat and 200# sandbag in the passenger seat, much like your "load and spring rate" adjustment range. I like it!

[redrazor]

Lots of things effect that. Load weight, spring rates to name two. We adjust to 3/4 to 1 1/4 toe in measured at 120" between targets. Which end of that range we shoot for depends on load and spring rate.

wouldn't 3/4 inch of toe-in cause front tires to scuff outside edges pretty badly?? ..... and 1 1/4 inch toe-in would seem to slow you down and really scuff the tires.(??)

[PinkRosePetal]

wouldn't 3/4 inch of toe-in cause front tires to scuff outside edges pretty badly?? ..... and 1 1/4 inch toe-in would seem to slow you down and really scuff the tires.(??)

Yep, I agree. That's seriously wrong.

Using the wheel rim as the datum (not the tyre) 2.5 - 3mm toe in is a good starting point. That's less than 1/8" for you USofA folks.

[DingerD]

Perfect! Thanks for digging.

[Cobwebs]

wouldn't 3/4 inch of toe-in cause front tires to scuff outside edges pretty badly?? ..... and 1 1/4 inch toe-in would seem to slow you down and really scuff the tires.(??)

Yep, I agree. That's seriously wrong.

Using the wheel rim as the datum (not the tyre) 2.5 - 3mm toe in is a good starting point. That's less than 1/8" for you USofA folks.

Divide those numbers by ten is how you arrive at the actual toe in. The laser targets are spaced out ten foot apart to give accuracy.

[IdahoMtnSpyder]

wouldn't 3/4 inch of toe-in cause front tires to scuff outside edges pretty badly?? ..... and 1 1/4 inch toe-in would seem to slow you down and really scuff the tires.(??)

Note that JC said 120" between targets. That would the toe-in over 120" which most likely is the targets spaced 60" in front and 60" behind the wheel center. That's about 0.6° for 1.25" toe-in.

[jcthorne]

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[PinkRosePetal]

You did not read what I wrote. Toe in is set at 3/4 to 1 1/4 toe in MEASURED OVER A 120" TARGET DISTANCE.

That's not my quote but yep, I just clocked that, I obviously had my squint thinking cap on, apologies to you, JC.