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Old 05-23-2018, 01:47 PM   #1
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New Michelin tires

My Toyos are 8 years old , look New but thinking of putting New Michelins on the front. Michelin does not make 295/75/R22.5 which is what the Toyos are. What size should I use? 34'FDD.
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Old 05-23-2018, 01:53 PM   #2
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275/80 22.5 would be a good fit.
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Old 05-23-2018, 01:56 PM   #3
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Quote:
Originally Posted by rgvtexan View Post
275/80 22.5 would be a good fit.
I agree. Most truck tire centers will carry these if you need one in an emergency situation.
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Old 05-23-2018, 01:56 PM   #4
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You'll have to watch the weight rating too, not just size.
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Old 05-23-2018, 02:00 PM   #5
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Michelin brand is up to you--lots of good input on tire brands from current post on this forum. My 2003 also came with 295/75r. I have used both 295/80r and 11r tires on my coach since the OEMs. These sizes are slightly larger in diameter so both speedometer and odometer are off--figure 3 MPH on speedometer and 5% on odometer [miles]. Am told Cummins can adjust engine ECM to accommodate larger dia. tires but have never bothered. RPMs are perhaps 100 lower based on displayed speed. Don't see any issues with slightly larger tires.
PS--the next step down is the 275/80r which is a considerably smaller tire in stance and appearance--not recommended--IMHO....
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Old 05-23-2018, 03:42 PM   #6
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Yes, the Michelin equivalent of the 295/75R22.5 is the 275/80R22.5.


And, you want the H rated (load rating) in either.
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Old 05-23-2018, 05:40 PM   #7
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Yes, the Michelin equivalent of the 295/75R22.5 is the 275/80R22.5.


And, you want the H rated (load rating) in either.

Correct as to the 295 and 275 being the same height...40.3 vs 40.2 respectively. The 275 is 20mm narrower. Both sizes will scale the same weight in either G - 6175 @ 110 psi and H- 7160@120. Using Bridgestone and Michelin data charts below.


My 2000 has G rated with a 10,500 front axle. I installed BFG's and am happy with those, but will go Michelin or Bridgestone for our next set....which will be soon. If you take them off before they are 6 years old, you should ask for a credit. They will get resold as used for $150 or more to a trucker


https://commercial.bridgestone.com/c...ook%202015.pdf


https://commercial.bridgestone.com/c...ook%202015.pdf
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Old 05-23-2018, 06:19 PM   #8
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Michelin tires

I am getting new tires in June, current tire is 275/70/22.5 Firestone and I am going to same size in Michelin. Current tires have H rating but Michelin has J rating. Am I setting myself up for problems? I assume a harder ride, anything else? Would I be better to go to 275/80/22.5 for G load rating?
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Old 05-23-2018, 07:00 PM   #9
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Sorry I see I posted BFS twice. Here is the Michelin data book.


https://www.michelintruck.com/assets...ok_Jan2007.pdf
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Old 05-23-2018, 07:08 PM   #10
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Quote:
Originally Posted by rfsod48 View Post
I am getting new tires in June, current tire is 275/70/22.5 Firestone and I am going to same size in Michelin. Current tires have H rating but Michelin has J rating. Am I setting myself up for problems? I assume a harder ride, anything else? Would I be better to go to 275/80/22.5 for G load rating?

275/70R22.5 LRH is your original size? It is 2 inches shorter than the 275/80R22.5.

IMO no need to go up in load range unless you are overloading your tires, your axle can carry more than your OE tires (highly unlikely). You cannot reduce air pressure, it is the same size tire. No advantage that I can see from the limited info I have.
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Old 05-23-2018, 07:08 PM   #11
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A friend of mine who owns a 2001 Monaco Dynasty had the 295 75 22.5 on it just changed to the 295 80 22.5 Toyos M144. I would go with the M144 Toyo's 295 80 22.5 16 ply instead of the Michelins and keep 3 grand in my pocket. See the chart for the difference of size


https://tiresize.com/comparison/
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Old 05-23-2018, 07:13 PM   #12
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Watch the Date Code on New tires! Have my 3rd set of Michelin's on order!
1st. set came in 1.25 years old! Sent them back. 2nd set was older yet, dealer turned them back before I seen them. Waiting now for fresh set right from Michelin.
Dealer has been great. They say warehouse will not check Date Code for them, order and return.
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Old 05-23-2018, 08:28 PM   #13
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Michelintires

My MH sticker calls for 275/70/22.5 G load rating. Michelin doesn’t make this size tire in G rating, it only comes as J rating. I have enough clearance to go to 275/80/22.5 G rating but that would change RPM/MPH rating because of difference in revolutions per mile. Which would be worse, J rating or RPM/MPH change?
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Old 05-23-2018, 08:47 PM   #14
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Quote:
Originally Posted by 1doodadd View Post
A friend of mine who owns a 2001 Monaco Dynasty had the 295 75 22.5 on it just changed to the 295 80 22.5 Toyos M144. I would go with the M144 Toyo's 295 80 22.5 16 ply instead of the Michelins and keep 3 grand in my pocket. See the chart for the difference of size


https://tiresize.com/comparison/

This is a good guide and will bring you close to the actual size. If you stay with tier1 and tier 2 tires your pretty good. but for more accurate sizing, check the manufactures data book.



Here is the formula:
275/80R22.5
275 is width in mm
80 is the aspect ratio - % height of sidewall in relation to the width


275*.80=220 mm height next convert to inches 25.4mm/inch
220/25.4= 8.66 inches in height if sidewall
8.66*2(sidewalls)17.32 inches
17.32+22.5 (wheel diameter) 39.82


Now you know more than many tire salespeople regarding calculating size.



Enjoy!!
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