Running different size tires - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 07-28-2011, 01:32 PM Thread Starter
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Exclamation Running different size tires

Is it safe to run different size tires on the rear end of my F250? I had a sidewall puncture on my tire and nobody local has that size. They are shipping one in but it will not arrive till Monday. Tire is a 315 and I will be running the OEM 285.

'99 Ford F-350 dually, Crew Cab 4x2 w/ 7.3L (Totaled- rebuild coming soon)

'01 Ford F-250 Crew Cab 4x4 shotbed w/ 7.3L


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Last edited by 7.3Leader; 07-28-2011 at 01:33 PM. Reason: Forgot to enter tire sizes
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post #2 of 5 Old 07-28-2011, 01:35 PM Thread Starter
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I forgot to add that the size I am currently running is a 315 and the spare is a 285.

'99 Ford F-350 dually, Crew Cab 4x2 w/ 7.3L (Totaled- rebuild coming soon)

'01 Ford F-250 Crew Cab 4x4 shotbed w/ 7.3L


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post #3 of 5 Old 07-14-2012, 02:10 PM
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Not really. If you have different diameter tires you will be running on the spider gears instead of the ring and pinion. They are not made to handle that kind of stress and you will trash the differential.
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post #4 of 5 Old 07-14-2012, 02:44 PM
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And off you have limited slip you will wear it out quick. Move the stock size tire to the front

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post #5 of 5 Old 07-16-2012, 02:11 PM
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^^ Agreed, put the smaller tire on the front and just don't use 4x4 and keep the hubs unlocked... It will handle pretty weird tho so watch the corners
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