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Topic: replacing 275-70r 22.5 tires with 11r-22.5 (Read 7172 times) previous topic - next topic
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replacing 275-70r 22.5 tires with 11r-22.5

Yahoo Message Number: 74386
any one have experience with upsizeing the stock 275-70r-22.5 tires on a 99 Allure to 11r-22.5? I have a 40ft Allure with a straight axle and would like to install a larger tire. It appears by just eyeballing it that the 3 inches would not cause conflict and I would like the increased ground clearance. I have the 330 ISC and realize that gearing would be affected by the increased circumference. I have the steel wheels. Thanks in advance for any advice.

David White 99 Allure #30349

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #1 –
Yahoo Message Number: 74387
I had a 98 Allure 36' with the 275 R 70. After receiving telegrams and notices not to drive the coach due to inflation issues, incorrectly labeled inflation charts etc. I called the VP of CC . We had a long discussion about tires, and even though CC was replacing the tires on 40' units with 275-R-80's, they would only pay for the original size on 36' units. We ll at one of the trips to the factory for warranty repairs and my first Home Coming, they sent another telegram informing me not to drive the coach until the two ride height valves in the front were moved to the rear and the single brought to the front. This was for 2 reasons. It allowed the duals to take the heavy side to side dynamics rather than a single left front tire that was already over loaded due to the slide room, and to shift the weight from the left front to the right. Which reduced the weight from 1100 lbs difference to 750, by transferring weight with the newly positioned ride height valves. I then convinced the VP of CC that because of their error, they should help replace some tires. That's when I met Doug Rutherford director of Chassis production and Larry Sherwood , Service Manager and they agreed. So CC split the bill with me and I got 6 new 275R-80 tires. 11R's were to tall and couldn't carry much more weight. The R80's allowed dropping the tire pressure 15 lbs, after taking split weight measurements. Now a lot of folks from that period who had 40' units were over loading their front axles, too. Especially if they had Kitchen slides!!!!!!!! At rallies in 2000 and 2001 CC was weighing coaches and helping people repack their coaches in order to prevent tire failures. Also they were replacing all the tires with 275R80's. I was disappointed they were not Michelin, but then at that Time Michelin and Foretravel were having issues with the 275R80 on their heavy 320 coach. So I took my Coopers and went happily on my way. I enjoyed a much smoother quieter ride, more fuel milage because the 330 was turning 100 rpms less as best as I can remember. There's a moral to the story in their some where. Install tires, adjust ride height valves, split weigh the coach, don't over load the front bay. Pack heavy things on the right in the bay's, and don't use 11R tires. TWI 98 Allure 30255/2004 Intrigue 11731

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #2 –
Yahoo Message Number: 74391
Look at 295R22.5 as a replacement of your 275R22.5, I had a blowout on the right front of our '91 Sedona CC. Road care wanted to send out a 255R22,5 what it came with, I had replaced them with 275R22.5 . The local tire shop had 2 295R22.5s in stock . they were with in walking distance from our resting place on the off ramp. They fit & might still be on it. I traded about 2 years later . Just my, 02. Bob '02 Magna 6028

From: dcblanco40

To: Country-Coach-Owners@yahoogroups.com Sent: Saturday, September 10, 2011 11:38 PM Subject: [Country-Coach-Owners] replacing 275-70r 22.5 tires with 11r-22.5

any one have experience with upsizeing the stock 275-70r-22.5 tires on a 99 Allure to 11r-22.5? I have a 40ft Allure with a straight axle and would like to install a larger tire. It appears by just eyeballing it that the 3 inches would not cause conflict and I would like the increased ground clearance. I have the 330 ISC and realize that gearing would be affected by the increased circumference. I have the steel wheels. Thanks in advance for any advice.

David White 99 Allure #30349

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #3 –
Yahoo Message Number: 74392
Your rear wheel spacing should be checked before attempting 295. If you can't find someone at OMC or CC to answer the Question, I would call Bob Dickman Les Schwab and speak to Don about the issue. They supplies and mounted all the tires originally on our coaches. TWI 2007 Intrigue 11731

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #4 –
Yahoo Message Number: 74393
295 tires weren't used on Allures until 2007. The coaches had evolved into a much larger vehicle by

then. 12R's came along in 2001 with IFS. 295 requires wheels with 9 inch rims you have 8.25 inch

rims. 295 require 13.2 inch spacing for the duals, 275 require 11.9.
Another issue is bottoming out

which will happen with the 11R I was informed at the time. 295 will rub also on the fibre glass of the

wheel well. Some folks that use 12R have stepped to 295, loosing diameter, as a 12R is the same size

as a 315 in diameter, but have increased carrying capacity, a good thing.
275R80 is a very popular tire

and should be easily found at a more economical price than the 295. TWI 2004 intrigue 11731/ 98
Allure 30255.

Original Message:
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Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #5 –
Yahoo Message Number: 74394
I would advise that you get the tire mfr's specs. I checked on Yokohama 295/70G, 14 ply rated at a T/A truck stop. Cost was way less that other tires and are available at any truck stop as it is a very popular truck tire size. But, the "G" rating and clearance was in question, especially in the rear. I also viewed the speedometer discrepancy as a nuisance. All the other tires that I considered are "H" or "J" rated. After checking specs and pricing, I finally decided on Firestone FS560 275/70H as the best value/performance. I bought six. They seem to be fine so far after six months with 3,000 miles on them.

Daron Hairabedian, 98 Allure 30226

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #6 –
Yahoo Message Number: 74398
I replaced mine with the larger size but will be returning to the stock size when I replace my tires later this month. I can put up with the speedometer being incorrect; I rely on my Garmin. However, the "taller" tires hampers leveling. My backend will actually come down and touch the tires. HWH said that is not a problem for the system or the tires because the leveling stops when it contacts something. However, there have been several times when I have been unable to get fully leveled when I would have if not for the tires.

Jim
10613

'98 Intrigue

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #7 –
Yahoo Message Number: 74400
This may not apply in your case. I went with 275-80 XZA3 tires. The orginal tires were 10R-22.5, my coach did not have a slide, so the recalls did not apply. The 275-80's were the same diameter as the 10R and would fit my wheels which are 7.5" wide, plus I went with "H" rated tires (16 ply) that increased the load carrying ability by a couple of thousand pounds. If you go to 295-80 I believe you will need wheels that are minimum of 8.25" wide.

I have been happy with my choice.

Jack Allure 1997 #30076

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #8 –
Yahoo Message Number: 74413
David,

I replaced mine with the TOYO M154 which is an 11R22.5. TOYO no longer makes the 275-70R so I had to switch.
The tires are 4" taller than the originals but there is plenty of room for wheel turn as well as dropping all the air. I have never had a problem with leveling. The engine works a little harder but there has been no change in my MPG.
Now if I only had the courage to reset the speedometer, it's off by exactly 10%. I use my GPS but can easily convert the speedometer reading too.

George

'04 Inspire 51061

Re: replacing 275-70r 22.5 tires with 11r-22.5

Reply #9 –
Yahoo Message Number: 74418
I had a 99 36' Allure which I replaced the 275R-22.5 with 280R's made by Continental after the 1st 4 years. They were 5% larger in diameter making the speedo run slow, but they each had 1000 pounds additional carrying capacity and that is all you need for those light weight coaches. If you go too big the wheel well may not be large enough and there is the dual tire spacing issue. The Continentals can be run at a lower pressure which will soften the ride without risk. Check with Bob Dixon, Les Schwab. You will find the Continentals to be less expensive, but excellent tires. The 275's are ok for the 36 foot model but marginal on the 40 footer of that vintage. In 2000, I think, they put larger tires on Allure and Intrigue because of too many blowouts of the 275's.

Dale Ford

04 Intrigue 42' Ovation 11713