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Topic: Tires (Read 11359 times) previous topic - next topic

Re: Tires

Reply #120 –
Quote from: Jimmyjnr –
Ok
I need to join fmca , that's if everyone agrees that Michelin tires are the best option!!!!!!


You can het into the Michelin Advantage program without joining FMCA.  Just join the Prevost group (it's free). 

Re: Tires

Reply #121 –
Come on and join FMCA, you will love it. The magazine is great and you can

get tips in there from Bret, as well.

Carter-

FMCA  47023

Re: Tires

Reply #122 –
Left at message at Foretravel, I never took my free year , so maybe

Re: Tires

Reply #123 –
I just put 2 Uniroyal RS20's 275/80R22.5 on my steer axle.  Tire shop pressurized them to 120 PSI.  Couldn't find a weight/air press chart for these tires online so left them at 120.  Took a short 300 mile trip last week.  Good handling and the ride was good too even at 120 psi.  OTD was $690 for the pair.  Getting 4 more on the other end.  Noticed no difference from the Mich's I replaced except extra $ still in my pocket. 

Re: Tires

Reply #124 –
Mike & Mari,
We have the same tires. $2200 out the door for all six. I got in contact with Uniroyal customer service concerning the tire pressures. They recommended getting corner weights and use the below chart. We are at 110 psi steer and 85 psi drive. The ride is superior to the Goodyears we removed.

Bob

Tire Selector | Michelin RV Tires

Re: Tires

Reply #126 –
My size isn't listed.

Re: Tires

Reply #127 –
For the 275/80R 22.5 LRH. Use the 11R22.5 chart.

Re: Tires

Reply #128 –
I see our Michelin XRV 255/80/R-22 were replaced in late '13, can't find the mileage, but the files show she only made a couple of trips in home state Arizona only until we bought her in late '14. So, I'm thinking 3k, was weighed and runs 82psi all around. Look brand new and track perfect! I've never used canvas covers on any of our coaches; instead, use "No Touch" spray. My files show our version of the tire, in the brochure, is "highway tread/summer". Which means to me if I was going back up north, these tires would not be suitable. Something to consider when buying fresh!  ^.^d

Re: Tires

Reply #129 –
We made a winter trip to Yellowstone and then Detroit a couple of years ago. We all piled in the RAV4 for the trip as I didn't want to drive the U300 on salted roads. Nearing Yellowstone, there were a flock of Bighorn Sheep blocking the highway. After passing through them, I asked the ranger station why the normally rare to see sheep were down on the road. His answer was that since that highway was just outside the park, the highway department salted the road and that attracted the sheep.

Having just installed a new chrome hitch ball in California, I was very surprised to see it was completely rusted when we arrived in Detroit. Since we all know we don't have the most rust resistant undercarriages on our coaches, it does not seem to be wise to intentionally expose our pride and joys to road chemicals. Since it's not really possible to fit chains to our tires, it seem doubly unwise to temp fate in winter.

Now and again, we drive in heavy rain. Our highway tread/summer tires have never hydroplaned or caused any anxiety on or off road.

Pierce

Re: Tires

Reply #130 –
Quote from: Roger & Susan in Home2 –
Mike,

Tire documents for UniRoyal, see page 21 for inflation chart.

https://www.michelinb2b.com/wps/b2bcontent/PDF/UNI_DataBook_E.pdf
I saw this online but wondered about the 11R22.5...figured this was probably the chart I was looking for but not exact size.  I am 9500ish on front.  Will prob stay with 95-100 psi for safety sake.  Like I said, the ride with 120 psi was not disagreeable, so any less pressure would be a bonus. 👍  Thanks Roger

Re: Tires

Reply #131 –
We had an 11R22.5 for a spare but it's not a viable option for anything. It's about an inch taller and will do more than polish the front airbag flanges.

Our 295/75's get nothing but 110psi cold. No ride problem.

Pierce

Re: Tires

Reply #132 –
Ride comfort should not be the only criteria.  Contact patch size is critical.

Re: Tires

Reply #133 –
Was up at OTM last week getting my transmission oil changed. Mentioned to Wayne [ex. FOT alignment guy] that my coach was wandering and I had to make constant corrections, when on roads with a little crown. He glanced under the wheel well and said he had aligned it before. He then asked what my tires had in them. I said 100 psi.  Had a cat weigh slip with me, he looked at it and said try 75 psi all around. Seemed too low, so I tried 85 psi.    Big, Big improvement. My coach is pretty light at 27500 fully loaded.  Better ride too, do not feel every tar strip anymore.

Re: Tires

Reply #134 –
Wayne made the same changes when we had a alignment. He lowered the pressures from the chart to what he felt was right. Three years later the tires were shot. I will never let anyone talk me out of following the manufacturers load/pressure chart again.

Re: Tires

Reply #135 –
Our PO put LRG tires on the coach.  When we had it weighed , all four corners with proper coach loads, at the 2015 GV we were right at the limits of the LRG in the front.  We switched to LRH last summer and adjusted air pressure for the maximum load on each axle plus 5 psi.  Better ride, better handling especially in cross winds.  75 psi even in an empty coach just seems too low to be safe.

Ours weighs closer to 32K, longer, bigger motor, bigger transmission, slide.  95 rears, 105 front. 

Re: Tires

Reply #136 –
Quote from: flite2010 –
Wayne made the same changes when we had a alignment. He lowered the pressures from the chart to what he felt was right. Three years later the tires were shot. I will never let anyone talk me out of following the manufacturers load/pressure chart again.

Actually I have goodyear 295/75/22.H's, and goodyear recommends 75 psi for my coach weight. I went 85 psi for a margin of safety. 

Max Speed Inflation Pressure - PSI  Goodyear spec's

                                    75    80    85    90      95  100  105    110  115 120 125 130
                            S 4725 4940 5155 5370 5510 5780 5980 6175(G) 6370 6610(H)
                            D 4690 4885 5070 5260 5440 5675(G) 5800 6005(H)

Re: Tires

Reply #137 –
We carry 100 all around and most of the time with temp and elevation changes, the tires are often closer to 95 when cold.

Standard comment from Wayne is to use much lower pressures all around, even though tire charts show closer to 100 if taking in consideration extra 10% for wind and cornering weight shifts + a safety margin. 

We never follow Wayne's advice.  We take safety over comfort.  BTW we are riding on XZA3+ LRH.

Re: Tires

Reply #138 –
Quote from: Barry & Cindy –
We carry 100 all around and most of the time with temp and elevation changes, the tires are often closer to 95 when cold.

Standard comment from Wayne is to use much lower pressures all around, even though tire charts show closer to 100 if taking in consideration extra 10% for wind and cornering weight shifts + a safety margin. 

We never follow Wayne's advice.  We take safety over comfort.  BTW we are riding on XZA3+ LRH.
Actually, Wayne's advice, 75 psi was exactly what the goodyear tire chart recommended for my coach weight, I added 10 psi more for safety. Checked tire temps at 100 psi and 85 psi and found little difference in temps, so obviously not wearing out the tire at lower pressures, and better handling and ride as well.

Re: Tires

Reply #139 –
Mine are supposed to be 87, 97.  At 32,000 actual load.  Full fuel, water, stuff