Thanks Mike, that is very helpful. Bill -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Mike & Christine Trettin Sent: Sunday, July 18, 2004 2:08 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: Re: IML: Tire size's > series raised white letter tires. I always thought that '70, '60, or > even smaller numbers meant the width of the tread. Is that not so? > My Crown Convertible Coupe is running on P235-75R15. Now the way I > read that is: P235 means the height from tread to rim, 75 means width > of the tire over the tread, which is 75 percent of the tire height, > and R15 means rim size. Hi Bill, You got it just backwards on those widths and aspect ratios. The collective wisdom of the Imperial Mailing List, including that of tire-maker's-son and general-all-around-good-guy Dick Benjamin, has been summarized in the Repair section of the website here: http://www.imperialclub.org/Repair/Wheels/size.htm Hope that clears it up! Mike Trettin 1956 Imperial Sedan, Turquoise