Yes, it's a girl asking so

[newtothis]

can I replace my '88s 4 r13 tires with r15s with no damage to my 88?

[Blof-fan]

Yes you can. But keep in mind you will need a other tire size if you want your speedo to be correct.
I use 195-50-R15's on mine and that works fine.

[Createdtoburn]

If you're going to 15's, if you wanna keep the Speedometer correct, go with 205/50/15's or 195/50/15's. Both work. Will do no harm.

[SCT]

Wonder if the 195-205/50/15 are about the same outer circumference as my 175/70/13. I think they are, my speedometer just be a dick to me sometimes.... 90mph yet I'm going just about the same rate as everyone else. My speedometer is +5mph at 0 to 60, anything higher seems to be up to 10+ mph.

195/50/15's

[Mr.Nutcase]

just keep the aspect ratio 10 above or bellow the number.

[Donald]

Go to this site, scroll to the bottom. There is a tire size calculator that you can use to figure out what possible sizes can be used, and how much of a variance there might be with your speedometer.

http://www.miata.net/garage/tirecalc.html

[REN69]

yes you can... however you have to take a lot into consideration, like for example Wheel size - 15x6.5 or 7inch wide with 35-40mm offset should be the safest, you could fit bigger wheels with lower offsets but you start having rubbing issues.

[PhatRoyale]

need more info.

wheel width, offset in order to make a judgment against the stockers

[Blof-fan]

Originally Posted by REN69

yes you can... however you have to take a lot into consideration, like for example Wheel size - 15x6.5 or 7inch wide with 35-40mm offset should be the safest, you could fit bigger wheels with lower offsets but you start having rubbing issues.

37 mm offset is the max. I got 38mm offset 7" rims and my 195 tires rubbed agains the shocks

[PhatRoyale]

^

Did you try dialing in some negative camber?

[REN69]

I've had 2 sets of 15x7 wheels with 38mm offset and had no issues...

[Blof-fan]

I had to use 5mm spacers to clear the tire off the shocks.

I had tires on there with rim protection, so the were a little bit wider than the rim, that may have contributed to the problem.

The camber was fine as it was. I'm not going to wear out my tires unevenly because I wanted those rims

Haven't checkes it yet, but our HB's might be a little different form your coupés..
But anyway...I wouldn't go any further than 38mm offset, just to be sure

[REN69]

Was this on the Coupe or the hatch?

[Blof-fan]

This was on the Hatch.

I already noticed the coupé has more room for the wheels in the rear. Haven't measured it yet though.

[REN69]

yeah, the coupe is what I was referring to... I wonder if the sedans are the same.