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

Re: Tires

Reply #220 –
Ok
My existing pressure gauge jammed one of the new valve insert.
Any recommendations for a quality gauge ?

Re: Tires

Reply #221 –
Milton makes some quality guages and inflaters.

John

Re: Tires

Reply #222 –
Trying to maintain a certain running pressure for tires seems unreasonable.  While checking pressures at rest stops, the sun side can often run 20 psi higher than the shade side.  Of course, I don't usually race my coach on a circle track-it'll run for many hours in one compass directions.  Setting cold pressure is good enough for me.

Re: Tires

Reply #223 –
Quote from: amos.harrison –
Trying to maintain a certain running pressure for tires seems unreasonable.

I agree.  And, much more importantly, so to ALL tire manufacturers.  All the inflation tables are for COLD PSI.  That is "before driving at whatever the ambient temperature is".

Yes, their engineers are familiar with the ideal gas law (affect of temperature change on change in pressure).  Yes, that was taken into consideration if calculating the inflation tables.

Yes, this IS different than race car tires. Not sure that is relevant, but ...........

Re: Tires

Reply #224 –
X2 on what Brett said. The engineers that design these tires kind of know what they are saying, but hey that's just me. Race tires have to last  a few laps, our tires have to last years.

Re: Tires

Reply #225 –
Millions of truck tires go millions of miles each year without a problem. They don't overthink inflation....just like those videos said, they top them off.

Re: Tires

Reply #226 –
Quote from: Dave Katsuki –
Just put on 6 Toyo M154s, but no experience with them yet (they were fine driving 20 miles back from the tire dealer  :) ).  Will report back when we move north.
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.)  The outer edge of the tires rubbed the rear airbag platform when turning at about 1/2 cut - e.g. on a right turn, the outer edge of the right tire rubbed the rear platform pretty badly at about 1/2 cut, and even if I could have adjusted the relief valves to restrict the steering angle enough, I wouldn't have been able to get around normal corners.

So I went back to Michelin 275/80R22.5 for the front (got  X Line Energy Z's LRH), and worked a deal with the dealer to buy the two almost new Toyo's.  The Toyo's on the back are fine, of course, and will provide lots more traction if we need it.

Re: Tires

Reply #227 –
The 270 must have different clearances as our '99 320 has no issue with 295/75/22.5 on the front.

Re: Tires

Reply #228 –
Yeah, I was surprised too, since folks said no problems with the wider tires.  Comparing the Michelins with the Toyo's on the front, I found that the Michelins feel tighter, especially responding to varying side wind, so I'm pleased with everything except for the extra $$. :(

Re: Tires

Reply #230 –

Remember, cut angles ARE (easily) adjustable on the Sheppard box. Of course if it hits at 1/2 of full cut angle..........

Re: Tires

Reply #231 –
Our Cooper 295/75-22.5s rub on the front air bag bottom plates during certain turns but don't do anything other than polishing the plate. Rear is not close. The 295/75s are about .75" wider than the 275/80s but the diameter is almost exactly the same. As Brett says, cut angles are adjustable. I can't see any marks on the tires from occasionally touching the plates in about 8 years.

The tire size calculator numbers will be slightly different from brand to brand.

Tire response will vary depending on brand and even different tread patterns in that brand.

Pierce

Re: Tires

Reply #232 –
Dave,
      Sorry to hear about tire rub.  Seems we all want to get as much tire under our coaches.  We too have Toyo's, except we have the Model M177 295/75-22.5.  They do not rub and we have over 1000 miles on them.  They do get very very close in the front.  We will continue to inspect for any rubbing.
John

Re: Tires

Reply #233 –
Ditto to above,have about 6K on mine,no rubbing.

Re: Tires

Reply #234 –
....no rubbing with my Toyo's on my 270, possibly tread design difference. Had slight rub on my 280 with 295/75 Goodyear's.

Re: Tires

Reply #235 –
Is the area that is rubbing structural, or could it be filed down just a little to allow sufficient clearance?

Re: Tires

Reply #236 –
Quote from: wolfe10 –
Is the area that is rubbing structural, or could it be filed down just a little to allow sufficient clearance?
It's covered when the bags are deflated but exposed when at operational height. It has a radius to it so with the coach going forward, the tire does not touch any sharp edges. With normal highway or city turns, it does not touch. Only when turning off of a road to another with a significant elevation change and even then, only some of the time. The "polish" is very light and at no time does the tire touch the airbag. It does not make any noise either. Don't think it would be advisable to attempt to grind any of the aluminum away as part of the steel mounting place would have to be modified also. As can be seen in the photo (forward most airbag, passenger's side), the normal clearance is about 2 inches. I just don't pay any attention to it as I don't think it is a problem.

Pierce

Re: Tires

Reply #237 –
Are those weather cracks on the tire or just shadows?

Re: Tires

Reply #238 –
Ya, the date code on that "bad boy" would be interesting.

Re: Tires

Reply #239 –
Those are NOT cracks, merely a "patina."

Pierce