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Discussion Starter · #1 ·
looking into some rims im a little confused the difference between 17x8, 17x9, 17x10.5. I understand its the different width but the bigger does that mean you have to change tires? im not really sure how it works
 

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Discussion Starter · #3 ·
staggered means different size wheels in the back right? i dont want to buy new tires i want to keep the ones i have now thats why im getting 17 inch otherwise id go 18 but anyway i wanna keep the tires i have now
 

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first off a wider rim means you run a wider tire, if you would plan to use the same size tire going from a smaller rim to a wider rim... that makes zero since as whats the point? Plus it looks stupid to have a tire stretched out on a rim thats to big.

The center number in the tire (275/40/17) the 40 is the percent of the 275 so 275 * .40 = 110

That 100 is millimeters (mm), thats how tall the sidewall is

275mm is how wide the tread is, 110mm is how tall the sidwall is, and 17 is the rim. So you need to maintain the sidewall height from stock so the speedometer is right

if you go up and down in rim sizes the sidewall has to go up and down to accomodate.

1 inch = 25.4mm for conversion needs

Sizes for 94-04 Mustangs

17x8 needs a 245/45/17 or 255/45/17
17x9 needs a 275/40/17
17x9.5 needs a 275/40/17 or 285/40/17
17x10 needs a 295/40/17 or 305/35/17
17x10.5 needs a 305/35/17 or 315/35/17

its not a perfect measure but you try to get as close and keep a wide enough tire to protect the rim lip without being to narrow or two wide.

With all that said there is no actual standard for tires.... some tire brands run wider/narrower than others.... have to find pics and research it to be 100% sure. Most are rather accurate.
 

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Discussion Starter · #7 ·
sorry i took so long to answer i havent been on in a while i have 245/45/17
 
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