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Old 12-27-2018, 12:01 PM   #1
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Help - Problem with Toyo 295/80r fitting on Exec

Just received a call from Les Swab that the new M-144 295/80R/22.5 tires on rear axle will not fit motorhome, they can get the inside tire on but not the outside, coach is in the raised position, checked my MFG. ID plate again and it states 295/80R for tire size. Looks like I will have to go back to M154 295/75R/22.5 tire, previous owner had Firestone 75R on coach, any body else have this problem.
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Old 12-27-2018, 01:08 PM   #2
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Maybe you can use a wheel spacer in between the dually tires (might have to install longer wheel studs too).

I have a set on my 4x4 truck form here Custom Wheel Adapters, Wheel Spacers, Hub Rings for your car! | Motorsport Tech

I don't know if they have a spacer to fit between your duallys (to keep them separated) but you can call them. If you do decide to stick a spacer in there, get a steel spacer not an aluminum one.

This is a photo of the spacer (and Centramatics balancer) on the front of my truck. Not helpful picture for your situation, but you can see motorsport-tech makes a quality product. They make these in house.
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Old 12-27-2018, 01:13 PM   #3
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Tires too large in diameter or what?
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Old 12-27-2018, 01:18 PM   #4
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Do they have the coach raised, or just raised to ride height. At ride height, they may have trouble getting them inside the fenderwell. At raised height they should not. On ours, it had the 295/75 toyos on when purchased used and they cleared fine in the rear. I went back to the original size of 295/80 but used an 11R with same specs. I have a 1/8" clearance problem on the drivers side when the air is dumped out so I have it stopped just before that. One of the frame members is different on the drivers side as compared to the passenger side. I will probably modify it next summer.



Another question, did they by chance get 24.5" instead of 22.5"? Just asking


In going back to the 11R it was nice to have the speedometer correct again. Hope this may help a little. Happy trails Bert
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Old 12-27-2018, 02:07 PM   #5
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Quote:
Originally Posted by Mr_D View Post
Tires too large in diameter or what?
If your asking me, Mr D, then yes. The stock tires on my 4X4 where 29" (8" tread width).
Now I running 37" (12.5" width) - with all the other proper "upgrades" to make it work and be safe.
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Old 12-27-2018, 02:14 PM   #6
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No, the question was for the OP.
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Old 12-27-2018, 02:33 PM   #7
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The front tires are the most likely to be over loaded .
So why not keep the 80s on the front and go with the 75s on the rear .
Many people run 11Rs on the rear , they are cheaper and readily available
at truck stops .

Ray
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Old 12-27-2018, 03:48 PM   #8
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Coach was raised to max height, the problem was with outer tire on rear axle, when Les Swab went to install they could not get the 80R tire to fit under wheel well, new 80R is to wide to fit between axle hub and outer body wheel well.

Mr. D, tires are approx 1 1/2" taller, the added width also add to problem.
I was told when I bought motor home that original owner attempted to install larger tires than 295/75R, I always thought he tried 315 tires but now I am thinking it may have been 80R. I had Les Swab verify DOT date of old tires and they were 2009, so if 75R went that long without any issues they should do it again.

Country B, spacer would not help, problem is getting tire under wheel well.
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Old 12-27-2018, 03:53 PM   #9
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RamiDav, looks like the 295/75R 16 ply tire will handle load, I have been thinking of maybe going with 80R front?
Still wondering why they won't fit on rear.
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Old 12-27-2018, 04:42 PM   #10
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What I hear is you are not at the jobsite and are taking their word for the height of the coach?

While I'm sure the Les Schwab folks are fully checked out on Monaco air suspension operation it doesn't pass my smell test. I could give it credibility if you were there to verify.

I would not be suprised if the air tanks are empty and they push the button for ride height and call it good. To believe the tire size that was original equipment does not fit is a little far fetched.
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Old 12-27-2018, 04:52 PM   #11
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I would want to see it for myself as something is wrong. Either the air ride has leaked down on the coach or something else is causing the issue. These shops often confuse jacking the coach up with raising the air ride height.

The width of the 295/80 and 295/75 are identical. The diameter difference is only 29mm (1.1"). That makes the radius to the top of the fender only .55" more on the 295/80.
If your coach has less than 1/2" clearance then it would be hitting on every bump you drive over. I've seen hundreds of 2000-2008 Monaco Dynasty's, Executives, and Signatures with 295/80 tires on the rear and several with 315/80 tires on the front. .
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Old 12-27-2018, 05:13 PM   #12
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Vito.a, I have a question, to raise coach wouldn't the motor have to be running, after your post I called Les swab again and questioned them on how they raised coach, they said they pressed raised button but did not start coach, I wonder if this is part of the problem. I checked and the 80R is 11.3 wide and 75R is 11.10 wide, almost identical. They are going to check with techs, when I got there they already had original wheel back on, may have another go at this.
Am I correct motor needs to run to raise??
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Old 12-27-2018, 05:27 PM   #13
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No need for a 295 on the rear with a tag axle...after putting 315’s on the front of my Dynasty I put 11R22.5s on the 6 rear as they are the same diameter.
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Old 12-27-2018, 06:54 PM   #14
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That's all very odd .

When they changed the drive axle 295/ 80's on my coach, I left the suspension at ride height, and all went without any issues. The aspect ratio of the sidewalls, shouldn't change the width of the tire. 295 millimeters is, well 295 millimeters.

You positive your coach didn't come with 275's?
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