Fox Mustangs 1979-1993 Mustangs Member Tech & Restoration Discussion

What size tires to use on 18 inch cobra r's

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Old Jan 16, 2006 | 04:18 PM
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odismorrison's Avatar
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I have a 1993 lx hatchback, i bought some 18 inch cobra r wheels in 4 lug, i plan on lowering it w/eibach springs can you suggest a tire size front and rear?
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Old Jan 16, 2006 | 05:56 PM
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If you lower the car you will only be able to run a low series tire. Sizes such as 245/40/18 or 245/35/18 (if they even make them that size). As for the width that depends on your rims. They might be too wide so be sure your rims will clear a lowered car before you get springs.
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Old Jan 17, 2006 | 10:03 AM
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Id guess 18x9. If they are its gonna be pretty tight with 235s or 245s.
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Old Jan 17, 2006 | 04:57 PM
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Originally posted by odismorrison@January 16, 2006, 7:21 PM
I have a 1993 lx hatchback, i bought some 18 inch cobra r wheels in 4 lug, i plan on lowering it w/eibach springs can you suggest a tire size front and rear?

I don't know about the 93's but I have a 90 GT Vert with the Eibach Pro Kit. I have Y2K Cobra R's which are 18X9 and I run a 235/40/18 in the front and a 245/40/18 in the rear. IMO a 9 inch rim is too wide for the front as I can't get a tire larger than a 235 to fit. The 235 is actually too small for a 9 inch wheel as it doesn't quite come to the edge of the rim leaving it open to curb damage. I plan to switch to an 8 inch rim on the front if I can find one.
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Old Jan 17, 2006 | 05:40 PM
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I think ours has 9" wheels all around and when we turn sharp the rim will grind on the A-arm. If I ever get some 5 lug chrome 95 Cobra Rs I will have an 8" up front and 9" out back.
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Old Jan 17, 2006 | 06:14 PM
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Originally posted by Hotrod@January 17, 2006, 8:43 PM
I think ours has 9" wheels all around and when we turn sharp the rim will grind on the A-arm. If I ever get some 5 lug chrome 95 Cobra Rs I will have an 8" up front and 9" out back.

Exactly why an 8 inch wide rim is the limit on the front of a Fox body stang. 18X8 with a 235 series tire on the front and 18X9 with a 245 series tire on the back with the stock quad shocks. Now if you flip the quad shocks you could probably go as large as a 265 series tire. I plan to find out if this is true this spring.
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