I just bought some GT rims. They are 15x6 in fromt and 15x7 in the rear. What are the recommended tire sizes for these? I assume the rear tires are a different size than the front. I'd like to go as wide as I can in width and probably a 215 for the height.

215 for the height, wow that's gonna be one tower of a tire . I think you meant it the other way around. Stock fiero size is 215/60/15, 225 is optimum as far as tires fitting 7" wide rims. You could possibly pull off a 235, but if I were you i'd just stick to 215/225.

i'm not really sure about the front tire sizes, i'd go with 205/60/15 if I were you (taking a shot in the dark here).

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96k Miles, 2nd owner

[This message has been edited by JamesCurtis (edited 11-08-2004).]

This should help. We ran 225 50 15 on the rear of our stock rims, I know people have gone wider on a 7 inch rim. Use this web site for a calculator.

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

Pete

I'm confused... are 215/50/15 or 215/60/15 stock? I could've sworn it was 60

Stock tires sizes on the 15" GT rims is 205/60R15 on front, and 215/60R15 on the rear. This goes for both the 86-87's, and the 88's.

quote Originally posted by jelly2m8: Stock tires sizes on the 15" GT rims is 205/60R15 on front, and 215/60R15 on the rear. This goes for both the 86-87's, and the 88's.

I agree!

What car are you putting them on? I put a set on my '85GT and used 195/60-15 front and 225/50-15 rear. They match the stock tire OD and I really like the look. I used Yokohama ES100 tires. (not good if winter is an issue)

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RickN
White 88GT 5spd
White 85GT Auto

Oops. Yes, I had it backwards.... 215 wide, not high..... yeah, that's what I meant! The link posted brought up another question. I'm upgrading from 14 inch rims with 215 60 14s on them. How do I recalibrate the speedometer? Or do I? Will I have to just get a 120 MPH speedo from a GT to correct this? I have an '86 V6SE with an 85 MPH speedo. Well, at any rate, I will go with the stock sizes you guys specified. Thanks for the info.

You're gonna love those ES100 225/50/15s. I wore through mine in like 3000 miles. I think they were like %50 tread when I got them with my rims

did you get yours new? if so how much and where

Just browsing through - I happen to have a set of Yokohama ES100's on my rear tires too - 225 50 ZR16 (on aftermarket 16" rims). They stick great and they cost me 100 bucks apiece at the local tire store.

quote Originally posted by 86GT3.4DOHC: You're gonna love those ES100 225/50/15s. I wore through mine in like 3000 miles. I think they were like %50 tread when I got them with my rims did you get yours new? if so how much and where

I bought mine new, about $100/tire at Discount Tire. I really like them. I have them on both my Fieros. 15s on the '85 and 17s on the '88. They are great tires but if you thrash them hard they won't last long. A friend of mine bought a set and put on his RX-7 after seeing mine. He burnt the rears off in one summer but he happily bought two more to replace them.

quote Originally posted by 86SE86GT: ...How do I recalibrate the speedometer? Or do I? Will I have to just get a 120 MPH speedo from a GT to correct this? I have an '86 V6SE with an 85 MPH speedo. Well, at any rate, I will go with the stock sizes you guys specified. Thanks for the info.

Also changing to the 120 speedo does not recalibrate for the change in tire OD. That requires a gearing change at the sending unit.

Stock sizes for what though? The stock 14" tires are smaller in OD than the stock 15" tires. The tire sizes I suggested match the stock 14" OD.

[This message has been edited by RickN (edited 11-09-2004).]

Stock tires for the GT rims like Jelly2m8 specified.