Spacer & Tire Size Question

[asubimmer]

I might be getting some 17x7 wheels REALLY cheap. What would be a good spacer...20mm? Also what size tire? 205/40/17? Does anyone know the website for the tire size calculator?

[redcarbon]

oh dear. how long have you been here? What's the offset, we can't help you until we know the offset.

I am not exactly sure the correct 17 inch tire size for our cars, but check out the FAQs for some nice tire calculators or search google for "miata tire calc". I know 16s are 205/50-16. Then that would be 205/45-17, but I know guys running 215/45-17 and 225/40-17, right?

[asubimmer]

cool...thats the site I was looking for...so 225/40/17 would be .4% too slow...spedo says 60 and actually 60.3...pretty good. is 225 too wide for a 7" wide rim?

haha sorry I ment to put the offset...42...that would help ;)

[redcarbon]

225 will fit on a 7" wide wheel. But you may have a problem with 20mm spacers, giving you et22 final offset. TJ runs 205s on a 16x7 et20 wheel, you may be able to get away with a 225 tire with the 20mm spacer - depending on the tire shape and how low you are. Roll your fenders and it would work, most likely. 15mm would definitely work with 225 tires with no alterations.

[erik325i]

you will want a 15mm spacer for your wheels.
20mm will work if you don't want to run wide tires. They will rub once you get anything wide.

215/40-17 is a great size. Good luck finding any 225/40-17s. Only a couple campanies make that size.

Don't get any tire with a larger rolling diameter (like 215/45-17). It will rub and piss you off.

-Erik

[MR 325]

215/40/17

...and buy my 15mm spacers :)

[asubimmer]

crap....like always the good deals go too fast. I will prob get new wheels this summer though...and if you still have those spacers in the summer I may pic them up ;)