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GT Performance Mods 2005+ Mustang GT Performance and Technical Information

18" wheels vs 17"s

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Old Sep 14, 2005 | 08:46 PM
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pony power
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If my GT orgianally comes with 17" wheels and I change to 18"s will there be any problems with the speedometer?
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Old Sep 14, 2005 | 08:48 PM
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Originally posted by pony power@September 14, 2005, 10:49 PM
If my GT orgianally comes with 17" wheels and I change to 18"s will there be any problems with the speedometer?
Not if you keep the overall diameter the same.

For example, stock is 235 55 R17. You can switch to 255 45 R18 and the overall diameter will only be different by 0.5% (which is insignificant).

No problems whatsoever
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Old Sep 14, 2005 | 08:51 PM
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perfect answer! also a tuner could adjust tire size changes.
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Old Sep 14, 2005 | 08:53 PM
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cool thanks boys thats a load off my mind
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