On 7/9/2017 6:55 PM, notbob wrote:
On 2017-07-06, Chaya Eve wrote:
Is it normal for the outside edges of the front tires to be stairstepping
on the outer inch or two only?

It's called "cupping" or "scalloping". Usta be common ona lotta older
motorcycle tires (Dunlap K70's). Never seen it on a car tire,
but, here is a link:

http://www.procarcare.com/includes/content/resourcecenter/encyclopedia/ch25/25readtirewear.html

nb



I've had it on two cars. FWD and the rear tires cupped. My '01 Regal
was the worst. I did not rotate them and the rear tires could have
lasted another 20k easily bit I could not take the noise any more.