Excellent article! Thanks for posting.

On 6/8/2015 1:45 PM, son_of_flubber wrote:
I learned about Tire Indentations the day after preemptively swapping the spare onto my trailer mid-journey in the parking lot of an Arby's...

http://www.tirerack.com/tires/tirete....jsp?techid=32

Indents are okay. Protrusions are not okay.

--
Dan Marotta