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Old 02-05-2014, 09:24 PM   #15
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I just bought four 295/75R22.5 and in my research seemed to be a very common and available size. My used coach had Michelin 275/80R22.5.
I replaced those with Dunlop 295/75R22.5 load G. According to specs, the 295 is the same diameter but .2 inches wider than the Michelin 275/80.
The tire shop said they interchange these two sizes all the time.
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Old 02-05-2014, 10:41 PM   #16
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Quote:
Originally Posted by GA Navigator View Post
I just bought four 295/75R22.5 and in my research seemed to be a very common and available size. My used coach had Michelin 275/80R22.5.
I replaced those with Dunlop 295/75R22.5 load G. According to specs, the 295 is the same diameter but .2 inches wider than the Michelin 275/80.
The tire shop said they interchange these two sizes all the time.
Here's a tool that I find really useful.

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

I put Dunlop 295/75 R 22.5, load G on our coach 4 years ago. Good tires. OK to use on our coach because the front axle GVWR is 10,000 lb. Each tire has a maximum load rating of 6175 lb., so that would mean the pair of front tires could carry a maximum load of 12,350 lb., which is far more weight that the front axle GVWR.

A couple of months ago, we had a road incident that led us to buy new steer tires. We purchased Bridgestone R280 tires in the same size, but load H. They are a heavier tire, with a much higher load rating, but they ride quietly and smoothly. So far, they appear to be a very good tire.

Jim
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Old 02-07-2014, 09:13 AM   #17
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Yesterday I changed up to Toyo 295/75R22.5 from the 275/80R22.5's that were on my '04 Horizon 40AD. The Toyo's were .7 inches wider and .3 inches shorter (height). Virtually the same weight carrying capacity. I had come clearance concerns, but after the bags were inflated to ride height, those concerns went away. Turned the wheel lock to lock; no clearance problems there either. So far so good.

I ran Toyo's on my local delivery truck for many years with no problems. We'll see how they perform on the MH.

Good luck with your choice. IMHO Toyo's can't be beat.
Feb. 7, '14 update: Some 5,000 miles later the Toyos are performing well. They are a bit noisy but that becomes the norm after a few miles. My only issue came with leaky valve stems and that wasn't the tires fault. The tire dealer had installed a dry powder like balancing media and apparently the tiny bits of grit find their way to the valve stem seat. Road aid re-inflated the first time, and by the second occurrence, I had bought an air chuck and hose. I'm running 100 psi in the rear and 110 in the steer tires.

The tires track well and don't seem to wander. I realize it's too early to tell with only 5000 miles on them, but they seem to be wearing uniformly. All in all, very pleased with the way they are performing.
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Old 02-08-2014, 12:23 AM   #18
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Originally Posted by johno97007 View Post
Feb. 7, '14 update: Some 5,000 miles later the Toyos are performing well. They are a bit noisy but that becomes the norm after a few miles. My only issue came with leaky valve stems and that wasn't the tires fault. The tire dealer had installed a dry powder like balancing media and apparently the tiny bits of grit find their way to the valve stem seat. Road aid re-inflated the first time, and by the second occurrence, I had bought an air chuck and hose. I'm running 100 psi in the rear and 110 in the steer tires.

The tires track well and don't seem to wander. I realize it's too early to tell with only 5000 miles on them, but they seem to be wearing uniformly. All in all, very pleased with the way they are performing.
When the tire guys decide to use balancing powder, they are supposed to install special valve stems that have a built in screen to prevent the powder from getting up into the valve stem. When you check tire pressure, make sure you use your air chuck to pressure a little blast of air into the tire first, to remove any powder that's lodged in the valve stem, before you check the tire pressure.

I think Dyna Beads are a better choice, because they are ceramic beads large enough that they cause no problem with ordinary valve stems. I have used Dyna Beads for several years and found them to be quite excellent.

Jim
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Old 02-16-2014, 08:57 AM   #19
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Anyone using the Toyo M144s? My neighbor just put a set on his Country Coach and I am thinking of giving them a try.
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Old 02-16-2014, 09:02 AM   #20
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Anyone using the Toyo M144s? My neighbor just put a set on his Country Coach and I am thinking of giving them a try.
You sure they aren't M154's? If so, I have had them twice. Good tire and I'd do it again.
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Old 02-16-2014, 12:41 PM   #21
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Gotta realize this, even if the tires are advertised to be a specific size, just between brands the actual diameter of the tire can vary significantly.

Also realize this, even if a tire is taller by 2 inches you need only one additional inch of clearance where it matters to clear the tire because 2 inches are divided into two on either directions of the hub; you don't need to clear the entire diameter, you just need to clear the distance from the hub center to the radial edge of the tire. You only require an inch to clear the suspension components, one from either end of the hub, not 2 on each end as one would imagine.

We are not dealing with low riding hot rods with .25" wheel well clearance.

Someone mentioned 11R. I have been studying the specifications from different manufacturers and I pay close attention to load rating and Revolutions per mile which I believe is true reflection of the real diameter of a tire.

11r22.5 and 295/80r22.5 differs by 1-2 revolutions per mile depending on which manufacturers you look at with 11R22.5 being ever so slightly taller on paper.
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Old 02-16-2014, 06:57 PM   #22
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You sure they aren't M154's? If so, I have had them twice. Good tire and I'd do it again.
As I understand they are fairly new and they are the M144s:

M144 | Toyo Tires
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Old 02-16-2014, 07:06 PM   #23
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As I understand they are fairly new and they are the M144s: M144 | Toyo Tires
Ahhhh! Looking at it, the M144's, they were made to fit the coaches that Michelin and Continental only serviced before.

Smart for Toyo to do that.

Any idea on price?
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Old 02-17-2014, 09:46 AM   #24
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Ahhhh! Looking at it, the M144's, they were made to fit the coaches that Michelin and Continental only serviced before.

Smart for Toyo to do that.

Any idea on price?
I was quoted $480 a tire. When you add taxes, mounting, etc it would run $3600 for six. Two years ago I paid about $750 a tire for the GY G670 when I bought two. The local distributors presently cannot get the GYs.
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Old 02-17-2014, 06:47 PM   #25
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I don't think you can go wrong with Toyo. A friend of mine managed a fleet of commercial trucks, both over-the-road and logging trucks. He specified Toyo tires exclusively for the fleet.

I've had them on two motorhomes. I specified Toyo M154 295/75R22.5 when I purchased my Alpine. Toyo was the OEM supplier for Alpine. They are now supplying original equipment to Toyota.
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Old 05-08-2014, 01:22 PM   #26
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Well I bought michelin 275/75-22.5. The same sixe as 295/75-22.5 by measurements but went from 6600 to 7100 capacity. They run smooth and are round.
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Old 05-08-2014, 01:56 PM   #27
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Well I bought michelin 275/75-22.5. The same sixe as 295/75-22.5 by measurements but went from 6600 to 7100 capacity. They run smooth and are round.
Why would a tire manufacturer make two identical products and give them two different measurement descriptions?

I suspect that the height and width may be close but the actual tread footprint on the pavement is probably greater on the 295.

Not really a big issue unless you are concerned about overloading an axle.
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Old 05-09-2014, 08:26 PM   #28
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We have a Cayman (RR4R chassis) that we have modified in several ways to include the Source Trailing Arms and also their Ride Enhancement Kit. Four corner weighing showed typical RR4R imbalance on rear axle, causing the Goodyear 255s to be maxed out on passenger side. When time came for new tires, we went with Bridgestone Ecopia R268 295/75R22.5 tires (brand new series) that carried more weight than the Goodyears at lower psi. It was a big gamble to jump two tire sizes (for me). We drove 157 miles today and were astonished at the improvement over the oem Goodyears. Much smoother ride and bumps less harsh. No interstate driving on this trip to Carrabelle, Florida and my guess is at 62 mph in 6th gear we ran about 100 rpms lower/less than before the tire change. Although the shop 'fixed' our speedo by computer, new tires were still 3.9 inches taller. I believe the 100 rpm change is the result of an effective rear end ratio change due to taller tires. Anyway, it is great so far, and I can't say enough about the ride change (yes, less than 200 miles). These are big tires, but no rubbing, etc. Had them mounted before adding Dynabeads to check for fit, then demounted and added the Dynabeads. This may be a partial solution to the RR4R mess, although the REK from Source is IMHO still most important. Porpoising was dangerous. Anyway, I concur about the Bridgestones being good tire.
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