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Old 03-26-2019, 05:27 PM   #1
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Buying Tires for the Coach

Hello all,
I am shopping for new tires for my 42 foot Country Coach. I have Goodyear 295 R80 22.5 on it now. I need to replace 3 (mix of ages). I am planning to use the discount thru FMCA. The Choices are Michelin, Continental and Hankook. Prices run from about $750 each down to $430 each. Quite a difference!
Does anyone have any thought on mixing tire brands?
I also notice the Hankook size does not match exactly. The closest they have is listed as 295 75R 22.5. Does that matter?
A dealer I spoke with suggested Toyo. Anyone have experience with them?
Lastly, does anyone have any quality comparisons or other comments besides "you get what you pay for"?
Thanks
Bruce
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Old 03-26-2019, 06:10 PM   #2
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Only replacing 3 tires? That doesn’t sound good.....I believe they should always be replaced in pairs at the very least.
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Old 03-26-2019, 06:18 PM   #3
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Mix and match with 3 new tires = NO.
Does 75R v 80R matter = YES.
Think about it friend: Your driving a 42 foot vehicle that surely weighs over 22,000 lbs (you don't say if your towing anything) = do you really want to have anything but the best (aka safest) tire setup possible?

Just MHO
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Old 03-26-2019, 06:33 PM   #4
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I gotta agree, replace and run in pairs. As tires wear down, their circumfrence gets less and less, this makes the bigger tire carry more weight than its smaller companion in a dual.


Check SimpleTire.com and look at the Hercules H902. I have then and they ride great. Three years and 15,000 miles and DynaBeads and nothing but wonderful things to say about them. FMCA probably can't beat that deal.
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Old 03-26-2019, 06:34 PM   #5
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And you want your best tires on the front, imho.
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Old 03-26-2019, 07:10 PM   #6
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Best tires on the front.
If something is going to blow you always pray it's a rear as you'll hopefully still have control. You shouldn't change tire sizes. The standard 295/80 is 40.1 in diameter and a 295/75 is 39.9 Each brand might be a slight bit different even if it's the same numbers on the side but when you actually change a number that's usually a problem when you try to add them to something already on a vehicle.
You can't pair the shorter tire with a taller tire as the weight loading will be more on the taller tire if it's on a dual. If you replace all with 295/75's then your speedo will be off as the smaller 295/75 tire will need to spin faster. At a given speedo indicated speed you'll be going about 3% slower. Not a big amount but it's just unsafe to mix sizes.
Above all you want to make sure your new tires have at least the same or better load range and speed rating as the original 295/80R22.5's

https://tiresize.com/comparison/
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Old 03-26-2019, 07:56 PM   #7
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First of all, Many dealers will beat the FMCA discounted quotes, plus you can get any tire. I went with Toyo in your same size for $383/tire from my local dealer. The only safe way for you to replace just three tires would be if two are going on the steer and one was going on the tag. Any other positions is a big No,No. My experience has been to replace all tires on the drive axle at the same time. Any other position is ok to replace just one as long as it is independent of the opposite side and is the same size. In other words the two sides are not connected with a axle shafts.
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Old 03-26-2019, 09:01 PM   #8
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I replaced all 8 tires 2 years ago with Yokohama's I've been very happy with them. They ride quiet and have performed as expected.
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Old 03-26-2019, 09:12 PM   #9
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Would not replace only 3, should be both fronts or 4 axles or front and axles. Tread height will make a difference in size when next to an old tire.
I replaced my Goodyears with Toyo and have been happy with choice, also your coach is heavy would go with 295/80's, 75's will not handle your front axle weight safely IMHO.
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Old 03-26-2019, 10:43 PM   #10
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If my math is correct 295 75 should be a 8.7 inch side wall height. 295 80 is a 9.4 sidewall height. That is a 1.4 inch difference in tire height. No way are you going to run two different sizes.
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Old 03-27-2019, 05:03 AM   #11
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I just ordered a set of Toyo tires. The price beat the FMCA discount for Hankook tires.
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Old 03-27-2019, 05:05 AM   #12
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Not sure why changing both duals on one side would be an issue. However I fully understand why you don't change one dual.
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Old 03-27-2019, 05:32 AM   #13
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Despite the fact I'm very particular about tires, I'm going to say that for most motorcoach owners any decent name brand tire is just fine. Few of us will come close to operating enough miles to realize a durability difference before they age out.

I'd be interested in real differences in ride and handling, but I doubt any reliable source of such information exists. Commercial fleet operations are probably the only ones with enough data, and cost per mile will be their main metric, because they'll wear tires out.
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Old 03-27-2019, 06:47 AM   #14
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Quote:
Originally Posted by apr67 View Post
Not sure why changing both duals on one side would be an issue. However I fully understand why you don't change one dual.
If a different diameter side to side the two sets will roll slightly different distances at any given rpm of the axle. At best you'll chew up tires, at worst the differential.
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