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Topic: Tires (Read 11354 times) previous topic - next topic

Re: Tires

Reply #260 –
Agree, less tread depth is a plus for an RV.  Better handling/less squirm.

Re: Tires

Reply #261 –
Bob, thanks.  I do have H range tires, and that handles a bit more weight than the G

However, my weight chart puts me at about 107-110 psi.  I would like to run a bit less but admonition on Forum seems consistent to be at top of psi for my weight

Interesting, tech folks that had been at FOT said in the day this coach came from the factory at at 95 psi front.  I wonder if different tires?

But you probably are very aware too of what new shipped with.....you think it was 95 psi?  And why did that if weight chart said 105+?

Re: Tires

Reply #262 –
What is your front axle weight?  Not judging. Just learning.

So you are at 13,300 pounds?

G's would be 12,300

Re: Tires

Reply #263 –
Yes Bob, give or take a 100 lb variation.  Have weighed about eight times

Re: Tires

Reply #264 –
Your front axle weighs roughly  2,000 pounds more than our non slide 97. 

Interested in your drive report

Re: Tires

Reply #265 –
Quote from: P. Wyatt Sabourin –
Quote from: Dave Katsuki –
Well I got experience with the 295/75R22.5 M154 Toyo's from Tucson up to Prescott, and unfortunately the front tires were rubbing the airbag platforms (and the airbag when it was compressed going around a corner.)

Dave: Do you know why your Toyo  295/75R22.5 M154 tires were rubbing on the front.
Other folks have posted that Toyo  295/75R22.5 M177 tires are OK on the front.
Is the rubbing Toyo M154 occurring because the M154 is wider than the M177, or is your front axle different (or configured differently) than the other coaches which can run 295 M177 tires?

A Toyo dealer in Victoria told me that the Toyo M154 tires is better for a motorhome than a Toyo M177 because the M154 is more stable.

No idea why the M154s were rubbing, and the dealer where I got the front tires changed to Michelin had never heard of that problem (but he probably didn't see many Foretravel U270s either...)  Only thing I can conclude is that the M154s are wider, since the current 275/80R22.5 Michelins are fine.  At first I thought that maybe the axle mounting bolt holes had some adjustment play (they don't seem to have any), but if the axle was moved forward much at all, I estimated that the Toyo tires would have rubbed on the front airbags.  It may be that our U270 has slightly different airbag mounting dimensions than the U295s and U320s, but that's just a guess.

Re: Tires

Reply #266 –
Mike I would run 110 on my steer tires in my old coach.

Re: Tires

Reply #267 –
Long ago my customers and I found a way we thought that was pretty accurate to verify the then current 9r and 10r22.5 tires in the OREDS and the Michelin pilots on the unihomes tire pressure, would be interesting to see if the newer tires design would still show what the old tires did.

You all might laugh and the new tires more modern design might not show this but who knows.

I used to run coaches through a water puddle then immediately on to dry fresh concrete. 

As we rolled forward the tire water marks would slowly dry out..

If you were seemingly overinflated the edges of the tire tracks would lighten earlier than the center.  Opposite if under.

A slight arc in the path would prevent the rears covering the fronts.

As tire pressures were a constant discussion because of over inflation issues I did this test many, many times sometimes more than once a day.

Everyone was amazed as changing the tire pressure  five pounds or less altered the water pattern.

No idea if this will show on these much better tire tech but it seemed to work long ago and gave a real test to back up the percentage of load/percentage of sidewall max load we used then to figure the correct pressures.

The current Michelin charts have a sliding scale in the load versus pressure chart.  Not a straight line.

Be interesting to see if anyone can see if this still works.

Or laugh at this.  Seemed to work well long ago. 

 

Re: Tires

Reply #268 –
We have the Toyo M177's and they do not rub but,I also have all new torque rod bushings on all 5 rods in front,this may make a
difference even if it's 1/8 of an inch.Not sure if it would but my bushings were well worn and a 1/8" move toward rubbing or not
is alot.