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Old 02-19-2015, 08:03 PM   #43
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All of the tire manufacturers you list are members of the RMA=Rubber Manufacturers Association. This RMA pdf on tire care is a must-read, Chapter 4 pertains to RV's.
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Old 02-19-2015, 08:25 PM   #44
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Yes they are Goodyear! Thanks for pointing that out.
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Old 02-20-2015, 09:25 AM   #45
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RE TPMS
Any TPMS is better than none and especially better than misleading yourself into thinking you can simply "Look" at your tires and tell if any are under-inflated.

This post has a quick Test for those that think they can tell if a tire is under-inflated or not.

Hitting a tire with a hammer or "bat" is not much better with 95% of professional truck drivers (i.e. experienced drivers) getting the inflation wrong by at least 20%
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Old 02-21-2015, 12:26 AM   #46
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Tpms with flow through or without?
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Old 02-22-2015, 10:28 AM   #47
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Flow-through are a bit heavier and limit your brand / supplier selection. If you are running my suggested +10% over the min needed for actual measured tire load you should only need to remove TPM a couple times a year, so unless you are 100% full timer I don't see an advantage.
I remove the sensor to save battery life when I park for the Winter. When I prep RV for summer I confirm the pressure with hand digital gauge. This allows me to confirm the TPM is still delivering correct info. Last summer I only needed to remove one sensor one time to add 6psi air to one tire.
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Old 03-08-2015, 11:06 PM   #48
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Got my 6 new (01/11/15 mfg date) Michelin XZA3 275/80R22.5's installed yesterday using the FMCA Purchase program. A big investment! My FMCA membership just paid off big time! Taking the coach in on Tuesday for an alignment just to make sure that I get the best wear on them.


I'm glad that I no longer have to worry about tires for several years! I've got my digital tire gauge, tire pressure charts, tire covers, soap and water to clean them so I think I'm good to go!


Thanks for your help and advice....I'll have to save my pennies for a while before I get the TPMS.
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Old 05-05-2015, 01:44 AM   #49
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OMG, what have I gotten us into

To begin with, I have never been one to check my tires, on my car, with any frequency.

I know.....Shame on me.

But as I read these threads and all the information, that is needed to carry 10s of thousands of pounds of MH, personal items and our loved ones...I am now seeing the great importance and knowledge needed for RV driving.

But I am sooooooooooo overwhelmed, by all of the numbers, charts, terminology, etc. that I feel that I have gotten into this live style maybe a bit too quickly.

And, on top of it all, I am about the least mechanically inclined person, that you will ever meet.

Please tell me there is an easier way to comprehend all of this vital information and utilize it correctly.

Eddie M.



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Old 05-05-2015, 08:21 AM   #50
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Eddie M., take a deep breath. Its pretty easy actually. Comes down to weight and pressure. Weigh the coach, four corner if you can, get the top weight for the rear and fronts. Then on the chart for your tires, find those weights and it will tell you what pressure to set your tires to cold. I usually go an extra 5lds of pressure to to cover myself. I bought a tpms and check the pressure before I get going each day. My tires are newer (less than a year) and they hold tire pressure awesome.
Keep the tires covered when parked and watch for weather cracking. That's it.
I've come to the conclusion that to own an RV, tires are just going to be replaced the 6th spring, period. Too much weight to worry about a couple grand everything 6 years.
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Old 05-07-2015, 12:41 AM   #51
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I am going to throw my 2 cents at this tire inflation biz.. I sold tires for 20 years and had many truckers as customers, but very few motorhomes..so when I bought mine I went and had it weigh, figure pounds per tire and all the math.. well it seems my tires could go on 60psi based on load when the manufacturer recommends 82 psi.. and when I checked the air they were set at 72 psi... ah! So I out them at 92 psi and took a trip..I think the coach handled a little better at 72 psi but i have not filled up yet so do not know the mpg figures, which with harder tires means more mpg.. yet the ride itself was not hard. I drove thru some tough cross winds so the handle issue is unsure .. my goal is to find out where a sweet spot may lie, in the terms of handling and MPG. I am not to concerned about tire wear as it seems most RV tires die of old age, not tread wear... hopefully I wear mine out first.
I will try and update as I find cause, bit if anyone has inflation info vs handling/mpg chime in...
I did not intend to hijack this thread bit thought it was most relevant here..

FYI I asked about hydrogen fill for my rv as my car has it, the guy said it it will kep you from having to check
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Old 05-07-2015, 07:52 AM   #52
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Quote:
Originally Posted by pfritz View Post
FYI I asked about hydrogen fill for my rv as my car has it, the guy said it it will keep you from having to check

Perhaps you mean nitrogen. Although hydrogen would make the tires lighter, it could make for a spectacular Hindenburg blowout. The other down side is that the hydrogen molecules are so small they would leak out in no time.
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Old 05-07-2015, 09:59 AM   #53
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I am going to throw my 2 cents at this tire inflation biz.. I sold tires for 20 years and had many truckers as customers, but very few motorhomes..so when I bought mine I went and had it weigh, figure pounds per tire and all the math.. well it seems my tires could go on 60psi based on load when the manufacturer (RV or tire mfg?) recommends 82 psi.. and when I checked the air they were set at 72 psi... ah! (is this indication of poor dealer pre-delivery check? What does tire placard say?)So I out them at 92 psi and took a trip..I think the coach handled a little better at 72 psi(Based on all controled testing I have done or witnessed more pressure should deliver better handling but also harder ride. Have to wonder how your results were opposite) but i have not filled up yet so do not know the mpg figures, which with harder tires means more mpg.. yet the ride itself was not hard. I drove thru some tough cross winds so the handle issue is unsure .. my goal is to find out where a sweet spot may lie, in the terms of handling and MPG. I am not to concerned about tire wear as it seems most RV tires die of old age, not tread wear... hopefully I wear mine out first.
I will try and update as I find cause, bit if anyone has inflation info vs handling/mpg chime in...
I did not intend to hijack this thread bit thought it was most relevant here..

FYI I asked about hydrogen fill for my rv as my car has it, the guy said it it will kep you from having to check
See comments & questions in RED

RE Nitrogen Yes many who sell this have claims that appear to be MAGIC. You might find this Blog Post from a tire engineer informative
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Old 05-18-2015, 01:07 PM   #54
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The 60 PSI pressure would be off the tire manufacturers load chart after I weighed them, but I think the min was 70 PSI but I weighed in much less. I have not checked the air for many months so they might have been at 82 at one time (RV manufacture suggested PSI ). It does ride a little harder and gas mpg went up 10-15%. Handling is not an issue, it seemed a little better at lower PSI but could be the conditions I drove after my post. Now have taken a couple trips and am staying with the 92 PSI.




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Originally Posted by Tireman9 View Post
See comments & questions in RED

RE Nitrogen Yes many who sell this have claims that appear to be MAGIC. You might find this Blog Post from a tire engineer informative
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Old 05-18-2015, 10:04 PM   #55
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Quote:
Originally Posted by Tireman9 View Post
RE TPMS
Any TPMS is better than none and especially better than misleading yourself into thinking you can simply "Look" at your tires and tell if any are under-inflated.

This post has a quick Test for those that think they can tell if a tire is under-inflated or not.

Hitting a tire with a hammer or "bat" is not much better with 95% of professional truck drivers (i.e. experienced drivers) getting the inflation wrong by at least 20%
I don't run TPMS....I probably should. But I do check air pressure every morning on the coach and toad. When I stop for fuel or a rest area I get out my handy dandy infrared temperature gauge. I hit the tires, wheels and rotors.....even the rear pumpkin. The lazy man's way of checking air pressure. If one is running hot you will know it, get the gauge!
I did catch a caliper hanging up on the toad a few months ago.

This works for me, but won't help if I lose psi on the road. May or may not be good for you. Bats are for baseball!
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Old 04-25-2017, 03:54 PM   #56
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I just need to know the tire size on a 1973 dodge sportsman rv. I'm buying it and would like to know so I can get a spare tire cover before I drive it to Monterey next week
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