Tire width Vs. Rim width chart

[howyhowy]

Hi yall, Is there a chart somewhere which tells me how wide a rim has to be to fit a certain width tire? For example what's the widest tires I can fit on an 18"x9" rim? I am thinking I should have ordered 10" rims for the back of my 07, and now I would like to see what limitations I have in choosing a tire size now. As a side note I was just able to fit 275s on my 2002's stock 17" rims - they made a little shiny spot inside the front wwell, but thats all. thanks, -howy 2007 MGTvert Manual stock 250mi 2002 MGTvert Manual stock 92kmi 1999 Durango stock 60kmi

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[waykooljr]

This calculator should help, it gives recommended Rim widths for the tire size you specify.

Tire Calculator

[SPARTAN VI]

Not liking the looks of this.. [:'(]

I just dumped some cash on 17" GT take offs (alloy) and got my Nitto 555s today (255/45/17), and that calculator is telling me that the diameter difference is too high (4.2%) Is this a good time to panic? [&:]

[howyhowy]

ORIGINAL: SPARTAN VI
I just dumped some cash on 17" GT take offs (alloy) and got my Nitto 555s today (255/45/17), and that calculator is telling me that the diameter difference is too high (4.2%) Is this a good time to panic? [&:]

If I got 275's on my stock 2002 GT's 17" rims I would think you should be fine, but I dont recal the width of my stock rims - I thought it was 8" or 8.5".
-howy

[SPARTAN VI]

That makes me feel better, but I guess I'll find out tomorrow.

[05SDI]

You will have NO issues at all with installing the 255/45 tires on stock wheels! See pics; Our car with 255/45/17 & stock suspension,

again stock suspension w 255/45/17,

Now lowered an inch and a half with 255/45/17,

The stock 235/55/17 vs 255/35/20 and 285/30/20 (I installed after the lowering strut and spring kit) If you go this wide you'll need wider rimes!

I don't have pic of them on the car yet! But compare the width to the stock 235/55 Pirelli!

05SDI

[SPARTAN VI]

Looks good! Thanks!

I already put a bid on some 18" fanblades with stock pirelli's.. definitely want to get up to AT LEAST 275 in the rear. Wider is better!

[06GT4RAD]

The general rule is this. The Tire should be no more than 4" wider that the rims width. In other words if you have a 20x10 wheel you would not want to put a tire on that was wider than 14" in width. So for a 17x8.5 you can go to a 12.5" wide tire


Richard

[swoosh_stang]

On the 17x8 wheels that come on the mustang you can go up to a 275 width, however, you may have to recalibrate the speedo.

[Sleeper05]

275/40-17 is the perfect tire for our 17x8 rims...ok not mathematically perfect, but perfect look and maximum width in back at least, and no issues whatsoever