Tire Pressure

[walt2137]

That tire patch oN my 99 Dip i considered as a Monaco CYA and would think the same of your 2000 .
Since you are going empty that would work but get the coach weighed and preferably each set of tires or each tire but if you cant at least get each axle .

[RVNeophytes2]

Originally Posted by vsheetz

If you don't have weights to properly set tire pressures, then inflate to max listed on the tire sidewall. IMHO.

That alone will protect you until you match recorded wheel-end or axle weights to the manufacturer's charts for the exact size and model of tire installed (not the one tested for the placard).

Yes, you might later find that you are slightly overpressured; but, better safe than sorry.

[RobRoy]

[QUOTE=vsheetz;3988688]If you don't have weights to properly set tire pressures, then inflate to max listed on the tire sidewall. IMHO.

Yes, this will likely result in a harsher ride than it dad to be... Get it weighed.[/QUOTE}

and what my friend who has sold and serviced truck tires for the past 35 years said to do also.

[Dtwallace]

Originally Posted by BobJones

Great info people - I guess I should have weighed it but time was short and it's now in a new park in a long-term area so I will probably be here for a while, meaning I won't be able to weigh it easily until the next test ride.

In the meantime, just to clarify, we had the pressures at 120 (the max rated pressure) and Dad said it road a bit harsh unless all the tanks were full. He said that made a big difference. Just reporting the news - not making it - but it's been all over North America on some pretty big rides from west to east and everywhere in between.

I just took a look at the tires, they are Michelin Pilot X - XZE in a 255/70/R22.5 on all corners. The load chart seems to be here, on page 39 http://tiregroup.com/Catalogs/PDF%20...s/Michelin.pdf

but I can't make heads or tails of it. The placard behind the driver's wheel shows what Walt so kindly reported, front = 10,000 rear = 19,000

Is that enough information to ball-park it? Just thinking I could adjust them now that it's stationary again and have it ready for the next test flight.

I might have made some more progress, it looks like the pressures should be 105 front & 115 rear according to this table;

https://www.michelintruck.com/en_CA/...or/#!/info/xze

Short answer is Dad had the tire pressure set as truckers run their tire pressures, to the max. you will never ruin a tire that way, but as you've already been told, it will ride harsh if not loaded.

I won't say this is right or wrong because I'm not looking for a debate, just giving you another perspective from experience, I too always run my tires at no lower than 95% of max rated load pressure.

I do this because it's worked for me as an OTR trucker for many miles and many reasonable years of service, using different brands of tires.

I'm a believer in never taking the chance of running any tire under inflated by accidently misinterpreting a weight to tire pressure guide.

This works for me because my coach is never running light when it comes out of the yard, always ready to work.

Again, just my perspective, submitted for your consideration, right or wrong.

A harsh ride is temporary and cost you nothing, a ruined tire will cost plenty.

DTW

[Flyin4Fun]

Originally Posted by Mr_D

Pressure molded into the sidewall of truck type (over 10,000# GVWR) are Not the maximum the tire should ever have. It is the Minimum to support the maximum rating of the tire. Go read the manufacturers truck brochures.

I like the way Mr. D worded this. The language used on the stamped tire pressure (molded into tire) is ambiguous... When we read the phrase "Max Tire Pressure - 135 PSI" it seems pretty straightforward. Most people would take that to mean "Do not exceed 135 PSI". When really what it's telling you - for this tire to perform at its maximum rated load, the tire must be inflated to 135 PSI.

This has been my understanding, but I certainly could be wrong. If I am, please correct me.

[RobRoy]

More to chew on.


Page 15

https://www.michelintruck.com/assets...k_Sept2011.pdf

Happy Trails

[Vanwill]

Bob Jones, no matter what you post on this or any other forum, there will always be a range of answers from "just do this until..." to "if you don't do this by the exact method accurate to .05%, you are taking your life in your own hands, risking your family's lives, causing global warming, endangering crops and increasing global famine, etc., etc., etc."

Use common sense and discretion and do whatever is reasonable under the circumstances. Yes, weighing your coach is a good idea. Necessary?--NO. Hit the road. Happy travels.