Orval Fairbairn wrote in message .. .
In article ,
"Larry Smith" wrote:

I'm looking at one here and wonder if it's not been caused by shimmying. I
just overhauled the shimmy dampener, which was dead. Thanks.

Shimmy will scallop a tire -- whether it is an aircraft tire or an
automobile tire.

The ones on the carts at the grocery store don't look scallopped.