Tire Size Options

[Ken Mikos]

Would someone be able to tell me what is the largest tire I can put on a stock suspension with a 15.5 wheel.

Currently running 185x65x15 and want to go a little more aggressive without tires rubbing on the fenders.

THanks (IMG:style_emoticons/default/santa_smiley.gif)

[horizontally-opposed]

If you want to maintain your overall diameter:

165SR15 (OE)
185/70R15 period upgrade for 914, standard on many early 911s
195/65R15 OE Porsche for many years (e.g. 911 w/215/60R15 rears)
205/60R15 looks great, not a lot of choices for tires, and iffy on a narrow car

You lose a little overall diameter with a 205/60 iirc, but it's negligible. 205/55R15 and 205/50R15 are another matter.

I've run my car on all of the above except 205/50R15, and prefer the taller tires on these cars visually—but did like the way it drove on 205/60 and 205/55. 205/60 can be iffy because of the particular tiremaker's actual sizes, or due to the particular 914. 205/55 a bit easier in my experience because it isn't as tall. Safe choice for a narrow car, and a 5.5-inch wheel, is a 195/65R15.