Want to put 235/85/16 tires on to replace 245/75/16 tires.

2004 FORD F-150
141,335 MILES
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STANDFIRM
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I have a 2004 Ford F-150 XLT 4x4. I currently have 245/75/16 tires. I'm thinking of putting on 235/85/16 tires. Do you think there will be any problems ? Will there be a problem ?
Jan 5, 2012 at 3:40 AM
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RIVERMIKERAT
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Your speedometer will read about 7% slower than what you're actually going.
Total height of 245-75 tires = 245 * 75%=183.75
Total height of 235-85 tires = 235 * 85%=199.75
Taller tires have a larger circumference. Larger circumference means more distance traveled per revolution.
If you take it to a speedometer or driveline shop, they can recalibrate the speedo.
Jan 5, 2012 at 4:41 AM
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STANDFIRM
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Thank you for the info,very much appreciated..Have a great NEW YEAR.
Jan 5, 2012 at 5:16 AM
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RIVERMIKERAT
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My pleasure. You too.
Jan 5, 2012 at 5:29 AM