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Old 05-13-2016, 03:36 PM   #1
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Anyone running Toyo M154 (265/75-22.5)?

Anyone running Toyo M154 (265/75-22.5 date 2012) on their RV?

Is your ride rough/harsh or smooth?


I have Toyo M154 (265/75-22.5 date 2012) on my RV, but the ride is very harsh.


2001 Fleetwood Discovery 37
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Old 05-13-2016, 03:42 PM   #2
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Mine are 2015 and smooth ride.
How much do you weight front and rear and what air pressure are you running?
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Old 05-13-2016, 05:34 PM   #3
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I do not know how much I weight front and rear. The MH is 26,000 lbs. I run 90 air pressure.
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Old 05-13-2016, 05:42 PM   #4
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I have the Toyo 154 265/75 date 14 running 110 psi #29000 gvw rides smooth, Toyo does not recommend running tire pressure to weight
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Old 05-13-2016, 06:09 PM   #5
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Quote:
Originally Posted by Frutza View Post
I have the Toyo 154 265/75 date 14 running 110 psi #29000 gvw rides smooth, Toyo does not recommend running tire pressure to weight
From Toyo:

Q: If my tire and axle loads are below the vehicle’s GAWR, can Toyo Tires recommend a more suitable air pressure than that shown on the vehicle’s tire information placard?

A: No. The vehicle’s placard pressure will provide some measure of air pressure “reserve” over that required for the actual load, thus providing a safety margin.

Q: What if the vehicle’s certification placard inflation pressure is too high or low?

A: The vehicle’s certification placard inflation is not determined at the whim of the vehicle manufacturer.

It is established in accordance with Federal Motor Vehicle Safety Standards (FMVSS 571.120) that require the tire size, load range and load capacity (by inflation) shall provide load capacity not less than the vehicle’s gross axle weight rating (GAWR). Although vehicle manufacturers must comply with this
regulation, some originally installed tires may require higher or lower placard pressures depending on the size, load range, and load capacity of the tire.

Q: What are the consequences of inflating tires to accommodate the actual loads?

A: If the inflation pressure corresponds to the actual tire load according to the tire manufacturer’s load and pressure table, the tire will be running at 100% of its rated load at that pressure. This practice may not provide sufficient safety margin. Any air pressure loss below the minimum required to carry the load can result in eventual tire failure.

https://toyotires2-1524598101.netdna...ion_tables.pdf
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Old 05-13-2016, 07:47 PM   #6
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Quote:
Originally Posted by Travel8 View Post
I do not know how much I weight front and rear. The MH is 26,000 lbs. I run 90 air pressure.
Where did you get the 26,000 lbs from? the very least you need is the weight of the front and rear when you are loaded for a normal outing.
Four corner weights are the best if you can find a place to get them as
most are surprised just how much their units weight.
My unit weights within a 100 lbs of yours and 85 psi COLD tire pressure is what I run. The truck tire business installed the tires and said to run them
between 85 and 87 psi cold tire pressure for the weight of my unit.
I watch the tires with a TMS system that indicates pressure and temp' of each tire and no indications of any problems.
I might add finding a pressure gauge that is accurate is a real trick as the 5 I have not a single one reads like the others and they all claim to be very accurate. I mention this as many gauges are nothing more than best guess and can be off 5 or more pounds.
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Old 05-13-2016, 07:59 PM   #7
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As a foot note I use 75 degrees for a stable tire pressure at my location and do not assume all tires are at that temp as in most cases the inside duals will be colder by a degree or two just siting in the morning. There is a formula for fig the pressure difference as it relates to temp of air in the tire if you need it.
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Old 05-14-2016, 07:48 AM   #8
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I switched to Toyo 154, 265/75 22.5, date 0413, on fronts approximately 25,000 miles ago. After weighing both sides of the front axle I set pressure from Yoyo's weight/pressure chart to heaviest side plus my safety margin. I run 90 lbs. in the front. I'm happy with the ride and the tires so will put Toyo's on the back when needed.
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Old 05-14-2016, 08:02 AM   #9
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https://www.yokohamatruck.com/commer...ure-calculator

Even tho this is from yokoama it is correct for Toyo tires
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Old 05-14-2016, 09:00 AM   #10
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Toyo won't recommend a pressure other than what the manufacturer's placard says, probably because they got burned in a tire inflation lawsuit once (though they ultimately were found to be guiltless). Legally, they want the full onus for recommended pressure to be on the RV maker, not Toyo. However, Toyo does provide load inflation table specifically for RV use so you can make your own decision.

https://toyotires2-1524598101.netdna...ion_tables.pdf

I'm running Toyo M144 in the 295/80R22.5 size and they are as quiet and smooth as any tire I've ever owned. I would recommend them to anybody.

Since the RV maker has no clue as to how much you will load into the RV, or distribution between front and rear axles, he has little choice but to recommend a tire pressure that can support the max axle load on the coach. In some [many?] cases that will be much higher than needed for actual load and result in an unnecessarily harsh ride.
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Old 05-14-2016, 07:26 PM   #11
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Interesting information and comments.

I currently run Bridgestones and will be shopping soon as the my tires are aging out.

I took the time to get some pricing on the Toyo and Bridgestone, the Toyo's are 1/2 the price.

I'll be watching this thread, mostly looking for problems.
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Old 05-14-2016, 08:21 PM   #12
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Quote:
Originally Posted by Gary RVRoamer View Post
Toyo won't recommend a pressure other than what the manufacturer's placard says, probably because they got burned in a tire inflation lawsuit once (though they ultimately were found to be guiltless).
I think for a few years after that fiasco, Toyo didn't want their tires mounted on RV's at all!

I'm running the same 144's as you. I run the pressures to the sticker by the drivers seat. So far, so good!
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Old 05-14-2016, 08:33 PM   #13
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I have 4 M154's on the back and run 86 to 88. The placard calls for 85 in the rear.
I do not notice any difference in the ride from the Michelins that I replaced. Mine have a March 2014 date.
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Old 05-14-2016, 08:42 PM   #14
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If I owned another gas MH, with leaf spring suspension, I would spend the extra money for true RV tires with softer sidewalls.
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