I insist that all my new tires, race or street, are within 1/4 inch of each other on the inflated circumfernces
![](/ubbthreads/images/graemlins/scope.gif)
I have had to over inflate one of my old sets of drag slick because one was around 3/4 inch smaller, I inflated it to the same circumference and sat it out in the son for half a day and let it down to the same pressure as its big brother, it still was smaller
![](/ubbthreads/images/graemlins/rant.gif)
I had to make it bigger by a 1/2 inch than the big one and let it sit inside overnight and that made them the same circumference at the same pressures
![](/ubbthreads/images/graemlins/1343795-scratchchin.gif)
. I had a race to go to and waited to long to order the new tires and still have enough time to return them for a perfectally match set, like most race tire comapnys guarenty
![](/ubbthreads/images/graemlins/shruggy.gif)
I now either buy them at the track or order them three to four weeks in advance to allow for mistakes like that
![](/ubbthreads/images/graemlins/shruggy.gif)
Insist the the comapny you buy them from give you a match set within 1/4 inch on the circumference, check them when mounted on the rims before you run them on the car, if there not a perfect match return them
![](/ubbthreads/images/graemlins/Twocents.gif)
Make the company you bought them from pay for the shipping both ways on the returns and do not let them charge you a additional shipping charges on the replacement set
![](/ubbthreads/images/graemlins/Twocents.gif)
Make sure and let them know you want a match set and your going to check them when mounted before ordering them
![](/ubbthreads/images/graemlins/1343795-scratchchin.gif)
![](/ubbthreads/images/graemlins/thumbs.gif)