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Old 06-02-2010, 04:22 PM   #1
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Michelin size = other brand size--??

There was a thread that discussed Michelin's 'odd' sizes and other brands equivalents, but I can't find it---

I'm looking to change out the 255/80-22.5's on our Allegro, and I'm NOT buying any more Michelin's, I got better places to spend the extra money..

I'll be checking Bridgestones, Hankook, Dunlop, whatever Costco has, NOT Goodyear or Yokahama, maybe Toyo...
but what size is compatible?
265/75? 275/70? I know those must be close, but...?

And, anyone know of any sales for cash & carry? (I can get my mounting done free)
Thanks in advance!
2000 40' Tiffin Allegro Bus \ 2002 Regal 2860 Commodore
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Old 06-02-2010, 07:15 PM   #2
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Here is a tire size calculator. There isn't a 22.5" but I used 22" on both old and new and the sizes showed the comparison. Click on the end view to read the data better.
Tire size calculator

Look under the tire graphic to see Speedo info.

I bought Toyo and they work fine. Good ballance and ride.

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Old 06-02-2010, 09:22 PM   #3
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The research I did showed the 265/75/22.5 closest to the 255/80/22.5 in overall diameter and revolutions per mile. Don't forget to consider your wheel size when considering changing to a wider tire. If your wheels are 8.25x22.5, you should be OK, 7.5x22.5 may put larger tires too close to each other under load.

I did my research by going through the spec sheets of the various truck tire manufacturers.
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Old 06-03-2010, 01:04 PM   #4
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We had a '78 CruiseAir many years ago with Toyo tires, I had no problem with them for 3 years of driving around, then one day, the right front started squishing around on a left turn-- the tread cord had moved. And less than 2 weeks later the left front did exactly the same thing.. One tire okay, two tires, I'm thinking I'll avoid 'em...
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1988 53 x 14 Skipperliner \ 1995 32' Party Cruiser
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Old 06-03-2010, 03:27 PM   #5
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This Bridgestone tire is being used by some on motorhomes and seems to be going well. It is available in 265/75R22.5 and should be used on 7.5" wheels.

Bridgestone R250F

I just put 4 in 295/80R22.5 on my drive axle.
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Old 06-05-2010, 04:01 PM   #6
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Tires are a frequent forum subject as it is an expensive item and they need to be replaced every few years. IMHO there are a lot of makers of pretty good tires today. Seems like the ratio of positive to negative comments is about the same for all. The exception to this rule seems to be the age cracks of Michelin's. That is a very frequently mentioned item. I have four Michelin tires that are five years old on the rear axle of my coach and they are getting age cracks. IMHO that is too soon to have that happen. I also have noticed that a lot of Goodyear folks have had "rivering" problems, whatever that is. When I look for four tires in the next few months I am going to be influenced by cost. Michelin is by far the most expensive and I am not happy having age problems on the ones I have. Check the internet for prices.
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Old 06-06-2010, 02:06 PM   #7
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Thumbs up for Toyos.
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Old 06-07-2010, 08:58 PM   #8
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I replaced my XRV 255x80x22.5 with 275/70R22.5 size. All the specs fit my rims and dual spacing. Tire is slightly wider. The new tires make 549 revs/mile where the old tires made 541 revs/mile, so the speedometer error is so small that I can't detect a difference.

Fred & Vicki
St. Augustine, Fl.
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