you can't look at it to tell if it's 'off'. remember we're supposed to be negative in the rear. it wouldn't be your tire. if it was it would look crooken when it was taken off the car. plus you'd hear it when you drove. after you do the mod you need to get it aligned. unless you've had one recently your most likely out anyway. be sure to go somewhere that gives like a 6 month warranty. let them adjust it and tell you how far out your rear is after like 5 washers. if they say your still to negative to be in spec add 1 more washer for a total of 6. than go take it back to check the alignment. unless your like Lt. commander data you can't tell what your camber angle is by looking at the tire. you can tell when a car is way out but you can't tell if it's correct.