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Old 09-29-2011, 10:43 AM   #1
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Cool Tires again?

38ft Mt.Aire on a workhouse chasis. I want to replace my 235x80x22.5 tires.I know that 245x75x22.5 size tires will fit but a more standard size 255x70x22.5 is available at a better price. Has anyone sucessfully replaced that size tire on my size motorhome,and with what brand? Thanks Jawpaint

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Old 09-29-2011, 12:40 PM   #2
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I think you will find that the wider and lower profile 255/70 tires are going to have a significant problem with too little dual spacing. Another thing to consider is the sidewall height difference from an 80 to a 70 is going to be "felt" more than changing from 80 to 75 because that flexing is what provides some "cushioning" effect to absorb bumps. Mostly, I would worry about the spacing issue. Ed

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Old 09-29-2011, 02:21 PM   #3
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Ed thanks for the comback. I have a price for Sumitomo's 245x75x22.5 for $2247.00.I'm not sure if thats a good price or not.I wanted to go with Hankook but they seem hard to comeby in my area, and they are 255x70.I think i'll go with the Sumitomo tires.Jawpaint
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Old 09-29-2011, 02:46 PM   #4
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I priced Toyo 245-75-R22.5 at $365+60 mount/balance + tax and disposal. Seems about the same as your quote. Oh, and it is done where we store the RV so I don't have to drive/wait/etc. just give the keys and $$$.

Even though mine is a Winnie, tires are the same.
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Old 09-29-2011, 04:55 PM   #5
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I recall someone reported problems with contact with the outer wheelwell when trying the 255-70-22.5. This was occurring when makeing a tight turn and concurrently transitioning something like an entrance/exit where the body wants to roll or sway. That of course is going to vary with the coach builders design. they were looking for some suspension aid to help, as they did not want to change tires again. (That 255 is 0.8 inches wider than the 235.)
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Old 09-29-2011, 05:26 PM   #6
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I had no trouble getting Bridgestone 245x75x22.5 tires. I paid $425.00 per tire out the door, and I would do it again.
95 Newmar Kountry Star, Spartan Chassis, Venice, Fla
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Old 09-29-2011, 07:48 PM   #7
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Thanks guys for your intrest and input.The price I was quoted seem's to be in line with what was posted.I think i'll go with the Sumitomo's. I will post findings when I have them installed
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Old 09-30-2011, 01:37 PM   #8
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i went with the summies. smooth quite drives great. about $360 otd in lost wages.
2007 NRV DOLPHIN LX 6342

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Old 09-30-2011, 05:26 PM   #9
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The 245/75 is the same diameter as the 235/80 37.1"

I replaced my 235/80 with GY 275/70 37.6".
A lot wider but not a problem.

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