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Old 09-03-2008, 09:46 PM   #1 (permalink)
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What is the best tire size for a 66 stang with stock rims? I am helping a friend that has a 66 convertible that has been sitting in storage for about 10 years. I would like to get him the widest tires possible.

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Old 09-03-2008, 10:49 PM   #2 (permalink)
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the widest on stock is going to be 225 in the front.. and 245s on the rear but that might be tight to fit on the stock 6" rim.. I am assuming when you say stock rim you are speaking about a 14x6 rim. A great upgrade is a bigger rim.
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Old 09-04-2008, 10:05 AM   #3 (permalink)
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The earlier post is the widest that will fit in the wheel housings I think. Putting a 245 (would have to be low profile) on a skinny stock wheel would cause all sorts of problems.

See:

http://www.tirerack.com/tires/tiretech/tirespecskey.jsp

for some info.

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Old 09-04-2008, 02:13 PM   #4 (permalink)
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An actual "stock" rim should be more in the neighbourhood of 5" or 5.5" wide IIRC - no way a 225 or 245 is going to work on that - it'll look like Roseanne Barr in a pair 26" waist jeans...
A 195 is perfect, a 205 is about the widest I'd go for something with a little more beef to it, without looking too "pinched" on the rim.
And regardless of what anybody tells you, although a wider tire may fit, you'll get no performance advantage out of it, due to the sidewalls being squeezed in so tightly onto the skinny rim, and pulling up on the outside edges of the tread. You can actually end up with LESS tread on the road than a skinnier tire that fits the wheel correctly!
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Old 09-04-2008, 04:21 PM   #5 (permalink)
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Agree! If you go to the tire specs, for example on tirerack the range of acceptable
rim width is listed. Too wide a tire for the rim gives decreased performance, overstressing
the sidewall and in spirited driving you can lose the bead seal and suddendly have a flat!
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Old 09-04-2008, 05:34 PM   #6 (permalink)
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205/70 is the widest tire you can put on a stock 1966 5" rim.
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Old 09-04-2008, 07:13 PM   #7 (permalink)
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In general, you want the rim width to be no less than 80% of the tread width or no greater than 90% for optimum handling. For shows, I have seen 70% used to make the tires look HUGE, but from a handling aspect, it would probably feel like the tire is laying on its side every time you turn a corner because of lack of sidewall support.

If the rim is 5.5", then minimum tread width would be 6.1" and the max would be 6.9"- but of course this does not take into account offset, etc.
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