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Old 02-01-2014, 09:39 PM   #1
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CC steer tire size.

Be more question guys and I'm goin to bed. B4 DW strangles me. The 1998 Magna were looking at (40'), has 295/22.5 on the rear and 275/22.5 on the steer axle. The purchase includes 6 new tires. Will 295's fit front too? Or should I go back to original 275's all round. Would like to stay with 295's h rated to carry the weight at lower pressures. What does this august body think?
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Old 02-02-2014, 06:14 AM   #2
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I would think you would need the most stout tires on the front axle. My Allure has 295's all around.

I would call Country Coach on Monday with the coach serial # and see what tires it left the factory with.
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Old 02-02-2014, 12:27 PM   #3
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I agree with the larger tire for front axle capability, but of course, not to achieve an increase in axle weight rating which is not possible.

CC had a recall to replace tires on rigs of our vintage because the original tires were under-sized. Also the front axles with smaller tires rode very close to being over weight. (I received six new tires as a result in 2002.)

CC Factory should have details on what size tires could be used on the steer axle as previously suggested.
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Old 02-02-2014, 10:38 PM   #4
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Mike - Do call Country Coach in Junction City and ask them what tires should be on it. On our coach it lists the size of tires in the brochure. On our coach the front tires were a size larger - 315 - compared with the back tires - 295. Having smaller tires on the front does not sound correct to me.
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Old 02-02-2014, 11:10 PM   #5
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You're missing a number in your sizes.

A 275/80 R 22.5 tire is the same size as a 295/75 R 22.5 tire.

The tires should have an 'H' load rating.

I agree that the front axle is supposed to have the bigger and/or stronger tires.

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Old 02-03-2014, 06:46 AM   #6
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You should have a label to the left of the drivers seat with the tire size listed. Don't know if the recall effected your coach. The 295/80/22.5 sounds correct all around .
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Old 02-03-2014, 06:53 AM   #7
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BTW: the 75 or 80 is the width of the tire, quiet a bit difference. Tire size calculator on the web, you can compare sizes.
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Old 02-03-2014, 10:44 AM   #8
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My tires are 315/80R x 22.5 front and 12R x 22.5 rear

This is from the brochure as my coach stored 8 miles away. I have a tag and 2 12R on tag axle and 4 295 80 22.5 on drive axle.
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Old 02-03-2014, 10:54 AM   #9
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Sounds like you have a mixture. I think the 12R is a truck tire,somewhat different than an RV tire, not sure how it matters, RV tire I think has softer ride? I installed a new set of Michelin's last year... 295/80/22.5 ,happy,happy..
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Old 02-04-2014, 06:30 AM   #10
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Quote:
Originally Posted by mytime View Post
BTW: the 75 or 80 is the width of the tire, quiet a bit difference. Tire size calculator on the web, you can compare sizes.
The 75 or 80 is the ratio of the sidewall height as compared the the tread width. Tread width, 275, 295, 315, whatever, is measured in millimeters. Here is the formula:
(Tread width) X (ratio # / 100) X 2 / 25.4 + wheel size

Example: 295 80-22.5

(295 X 80 / 100 X 2 / 25.4) + 22.5 = 41.08
The tire is about 41" tall.
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Old 02-05-2014, 01:25 PM   #11
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Originally Posted by Papa_Jim View Post
A 275/80 R 22.5 tire is the same size as a 295/75 R 22.5 tire.
I've heard that many prefer the 295 because it's used on trucks and finding a replacement is easier and (I think) cheaper.
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Old 02-06-2014, 12:14 AM   #12
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Originally Posted by JohnFitz View Post
I've heard that many prefer the 295 because it's used on trucks and finding a replacement is easier and (I think) cheaper.
You may be right.

Our recent experience. We had a tire problem on the road. We pulled into a truck stop. We needed 295 75 22.5 tires. They offered Michelin 275 80 22.5 and Bridgestone 295 75 22.5. When I questioned them, they said the two sizes were completely interchangeable and regarded as being the same size.

I didn't know what to think about that, so I went for the Bridgestone tires primarily because they were the same actual size.

Then I found this tool, which is really handy to have.

295/75-R22.5 vs 275/80-R22.5 Tire Comparison - Tire Size Calculator

Jim
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