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Old 03-05-2014, 12:02 PM   #1
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Tire Time

I currently have Michelin 235/80r/22.5 on my Tradewinds. It's about time I do tire shopping. The above number is a Michelin size and not shared by other tire manufactures. Michelin is a great tire but I am exploring other options. Of course the other tire makers numbers are a little different. My question, has anyone had any issue with the slight differences in tire sizing when using a different tire maker ? Toyo,for instance, is 245/75/22.5.
I'm sure the subject has been discussed before somewhere in the forum but....
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Old 03-05-2014, 05:18 PM   #2
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It is no problem at all. The difference in diameter is approx 3/10 of an inch smaller. One inch smaller in circumference. Speedometer will be 1/2 mph off at 55 mph. Just make sure the tires are size matched on each axle and are appropriate load range, etc. I am sure that you will get lots of input on brand preference but size is fine.
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Old 03-05-2014, 11:39 PM   #3
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Thanks homecan,
When you say size matched per axle, your talking left side and right side, not front and rear ? I have new Michelins on the front and am replacing the rear. Load range I'm aware of.
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Old 03-06-2014, 02:52 PM   #4
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I've had a set of TOYO 245/75 22.5s on mine going on 4 years. Ride is great, no problems.
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Old 03-07-2014, 07:33 PM   #5
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Yes, I meant left and right as well as on dually sets. Size difference front to rear won't be an issue for you.
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Old 03-07-2014, 09:08 PM   #6
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Axle to axle variation is not an issue but side to side is. In addition to the slight size difference be sure you know the correct inflation to run on the new tires.

I assume you already know your actual "corner loads" so you know the heavy end of each axle. That identifies the minimum cold inflation for ALL tires on that axle. I always suggest adding 5 to 10 psi (but not exceeding wheel max) to the cold infl so you aren't chasing your tail when the ambient temperature changes which will affect tire inflation at about 2% for each 10F change in temp.
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Old 03-08-2014, 06:15 AM   #7
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I have the same tires on mine for 3 years now with no regrets.
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Old 03-09-2014, 09:36 PM   #8
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Thanks for all the information. Going for tires tomorrow.
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Old 03-10-2014, 08:51 PM   #9
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We replaced our aging Goodyear's 2 years ago w/Firestone's. Even w/the FMCA Michelin tire discount I couldn't justify the price difference. The Firestone tires ride smooth and quiet. So far so good.
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