13 Jun 07, 08:58 am
Definitely new tires first. Without even discussing how the worn tires affect the alignment, consider that a GOOD alignment tech (FRONT END SHOP) will test drive it before and after and make the necessary adjustments to allow it to drive down the road correctly. Most shops will set it in specs, blame it on the lift and say see ya. If you are worried about wear before the alignment, simply throw them in the back and have THE FRONT END shop install them before taking it for a drive.