From: james@pelicanparts.com on behalf of James at Pelican Parts [james@pelicanparts.com] Sent: Thursday, May 27, 1999 5:33 PM To: pelicanparts@csi.com Cc: Michael Schmid Subject: Re: 1983 944 Tire sizes For reasons of liability I wont be too specific. I will tell you tires sizes are dictated by the tire manufacture. In other words: the tire manufacture decides what size wheels are compatible with a given tire. Your tire dealer should have this information; but few do and you may have to contact the manufacture. As a general rule of thumb: ideally you want the contact patch of the tire to be the same width as the rim. An inch wider (tire) may be ok, but beyond that your asking for trouble. Also: if you use a wider than stock tire, you'll need to use a reduced aspect ratio in order to maintain proper operation of the speedometer. For a 7" rim I have found 225/50 to fit real well. Not many manufactures' make a 235, and a 245 would simply be dangerous. With the correct wheel and tire combination, it is possible to fit a 275/35x17. In regards to the difference between front and rear sizes: if you change one end by a certain amount, you should also change the other end by the same amount. Good luck james Wayne at Pelican Parts wrote: > Hi there. Let me forward this email to James in Tech Support, who can help > you out with an answer. > > Thanks, > > Wayne > > Michael Schmid wrote: > > > I own a 1983 944, with the original "cookie cutters" on it. I want to put > > wider tires on the rear, but I am not sure how wide I can go. Ca you tell > > me, based on the fact that I have the original factory rims on the car, > > which tire sizes will fit (or which sizes YOU recommend front and back). > > Thanks, > > Mike