Thread: Rim/tire width
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Old 01-19-2012, 10:37 AM   #4 (permalink)
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"stretching" the tire will reduce sidewall flex. Running the 185 on a 6.5" wheel would have a positive (although inconsequential) impact on economy if the wheels were of equal weight and aerodynamic drag.

There is a point where you have too much stretch, but a 185/65 on a 6.5" wheel will have no issues at all.
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