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Old 02-28-2013, 02:59 AM   #1
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Tire sizes on 93 magna, 36'

I am going back and forth on tires and was wondering if you guys in the similar coach are running the michelin xrv 255/80 22.5 tires. Just wanted to verify that this size is correct and this is the best tire for my rig.
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Old 03-06-2013, 07:47 AM   #2
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Quote:
Originally Posted by bobioknight View Post
I am going back and forth on tires and was wondering if you guys in the similar coach are running the michelin xrv 255/80 22.5 tires. Just wanted to verify that this size is correct and this is the best tire for my rig.
not sure about your coach but that tire is one of the best tires you can run. as far as the size it should be wrote on the inside of the door or glove box or above the wheel well. I hope this helps.
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Old 03-09-2013, 08:45 PM   #3
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I also have a 1993 36ft Magna, and I have changed my tires twice, since
I bought it about 7 years ago. I changed my steer tires to a 275/70/22.5,
because the the 255/80/22.5 had to be run at max pressure to just match the
front axle capacitiy. The 275/70/22.5 tire allows me to run at a lower pressure,
and still have excess capacity. My first tire change was to Toyo, and I used
265/75/22.5 for the drive tires. This size is very close to the Mich. 255/80/22.5.
I now have Mich. on and also went with the 275/70 front, and 255/80/ for the duals.

I would have gone with the 275/70/22.5 on the duals, but was concerned about
having enough dual spacing.

The coach handles well, and milage remained the same around 9 mpg. I tow a
jeep liberty.

Wayne Sall
1993 CC Magna #4991
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Old 03-10-2013, 12:46 AM   #4
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Wow, thanks. That's the kind of information I was looking for. I am also concerned about over weighting the tires and could not find anything that was specific enough to point me in the right direction. I will check these out, thanks.
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Old 03-10-2013, 10:38 AM   #5
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To be sure i understand. Are these the tires you chose?
XZA2 ENERGY - 275/70R22.5 - J rated
XRV - 255/80R22.5 - G rated

I currently have 7 year old michelin 255/80r22.5 tires on now. Which is a good sign that they last. Very little wear or cracking on them.
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Old 03-10-2013, 05:06 PM   #6
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tire size 93 Magna

That is the combination that I now have. They are presently 6
years old, and show no signs of cracking or tread wear.

I will probably replace them next year(because of age) with a
less expensive brand because of so few miles I have been running
the last couple of years.

Wayne Sall
93 Magna #4991
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Old 03-11-2013, 04:57 AM   #7
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Quote:
Originally Posted by holmeshunter View Post
That is the combination that I now have. They are presently 6
years old, and show no signs of cracking or tread wear.

I will probably replace them next year(because of age) with a
less expensive brand because of so few miles I have been running
the last couple of years.

Wayne Sall
93 Magna #4991
I would love to see a picture of your coach....ours is coach #4904
We have 10R22.5 on the rear thats the size already on her just went back with the same,
Michelin XZE, put Toyo on front because of the age over mileage thing
rears were $2600 bucks, fronts were $900
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Old 03-11-2013, 09:08 AM   #8
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Hey Benford, what do you think of putting a wider tire up front. The wider tires carry more weight so reducing tire pressure possibly creating a softer ride up front. Possibly creating a safer coach because the fronts will not be overloaded. Wider tire may also provide more stability while driving and less of a chance of sinking in the soft stuff, AKA Texas Pastures.
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Old 03-11-2013, 03:49 PM   #9
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Quote:
Originally Posted by bobioknight View Post
Hey Benford, what do you think of putting a wider tire up front. The wider tires carry more weight so reducing tire pressure possibly creating a softer ride up front. Possibly creating a safer coach because the fronts will not be overloaded. Wider tire may also provide more stability while driving and less of a chance of sinking in the soft stuff, AKA Texas Pastures.
I don't really have an answer for that,
Would there be any clearance issues?
Don't want them to rub in a sharp turn,
other than that , it would be up to you I suppose,
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Old 03-12-2013, 12:16 PM   #10
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Yes I suppose so. Makes sense but not sure it is necessary. Would hate to have rubbing issues. Still Torn, may just save some money with the toyos and call it a day. Sometimes you just got to say fughettabout it! And go with your gut.
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Old 03-12-2013, 08:28 PM   #11
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tire size 93 Magna

The reason I run 275/70 tires on the front is for safety. The 255/80 tire
has to be run at max inflation which is 110 lbs to just equal the front axle
weight, which is 10410. By going with the 275/70 tire, weight factor goes
to 10800 at only 95 lbs.

The width of the 275/70 is 1 inch wider, but the diameter is only 38 inches
vs 38.2 for the 255/80. The revolutions per mile are almost identical.

If you go with a different brand and use the 265/75 size for your duals, the
diameter of them is around 38.4.

Google "Michelin RV Tire Guide" which gives a lot of good information on
specs, and care of your MH tires.

Wayne Sall
93 CC #4991
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Old 03-12-2013, 11:25 PM   #12
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Wayne, you sure have done your home work, thanks for sharing. What was the purpose for you going from toyo to michelin. I see the toyo is a little taller, are they rated for the heavy coaches like ours? Are we talking inflation in the higher scale?
What does your coach weigh in the front and rear?

Safety is a big concern and your right the higher rating tires in the fronts would be safer and I wonder if a softer ride also because of the lower inflation ( unless the tougher sidewalls offset that ). Does yours rub?

Would you consider a toyo again, I see they are a bit taller, which I would think is a good thing, also all tires would be the same size for better rotation and service.
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Old 03-14-2013, 05:46 PM   #13
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tire size 93 Magna

I went with the Michelin this last change because I was able to buy
them at a good price. The ride on the Michelin's seem to be softer,
and quieter. The front axle rate on the 36 Magna is 10410 which is
exactly the max a 255/80, or 265/75 tire is rated for. The rear axle
is at 17500, which is well with-in what the above tires are rated for. All
brands of tires in the 255/80 or 265/75 size seem to say their max
weight capacity is 5205 per tire, thus a total of 10410.

The only reason I don't run 275/70 all the way around is that I am
not certain that I have enough spacing on the rear duals, so there-
fore I have to run the two sizes, no matter what brand I choose.

I probably will look at several brands the next change out, with
Hankook being one of them. If I were running a ton of miles every
year I would stay with the Michelin's. It really kills me to change every
6 or 7 years, and only have around 10/12 thousand miles and at
least 95 per cent tread on the old tires. I have always been able
to talk the dealer in giving me at least a 75 to 100 per tire trade-in.

Wayne Sall
93 CC #4991
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Old 04-08-2013, 09:02 AM   #14
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I find these posts interesting as I am now looking to buy a CC or a Monaco Dynasty. Both coaches seem to be close in weight and equipment, on average. I am leaning on the Dynasty if for no other season than it carries 295/70R 22.5 and the CC 255/70R 22.5. Does any one know why the big difference ? I once owned a Monaco Windsor and was always overweight pulling my enclosed car hauler. The Windsor had the smaller 255s also. Had one blow out on the Windsor which was always 19,000 to 20,000 on the ground.They always looked too small for the wheel well also.
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