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Old 05-05-2013, 07:52 AM   #1
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Tire psi values: Encounter owners only

[edit] Oops, the tile should have been "Encounter owners only" since we are likely to have the same brand, model, and size of tire.


I put this together for myself this morning as I get ready to adjust pressures before the morning air starts to heat up.

Since I have found myself looking for the chart and refiguring tire pressures more than once over the last three years I put this little reminder together which I will keep in the coach for reference.

I found the most recent Michelin pressure chart available, cut and paste the table for the "XZE" and "XRV" tires ( I have XRV and assume more Encounters will have that tire), along with a brief "fill in the blank" statement for the front and rear axles.

It is fairly easy to get weight by axles and divide by 2. You have to assume the axle weight is even side to side with this approach. If you can get all four wheel sets weighted (let me know how you got that done) than go with the heaviest wheel on each axle and use that psi value.

The plus 10 psi is just a personal safety factor I use, you may not want to drift from the chart values. Its a personal choice.

The first one is my psi values based on my load out.

The second version is a blank you can print and use for yourself if you choose to do so.

You might also want to add to your vehicle weight the following values as appropriate:

Food
Your weight
Your DW/DH weight
Full tank of water About 8.4 lbs/gallon (70 gal = 588 lbs)
Full tank of gas About 6.2 lbs/gallon (80 gal = 496 lbs)
Cloths

Roll
Attached Files
File Type: docx Weight table for GLF as of 4-1-13.docx (62.2 KB, 43 views)
File Type: docx Weight table for Encounter blank.docx (61.9 KB, 29 views)
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Old 05-06-2013, 11:16 AM   #2
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Great info! And timely for me as we're heading out soon on a long trip...

We're currently at 90psi cold front & rear, per the sticker behind the driver seat. Tires are: 235/80R22.5G (just "G"; not "LRG" as stated in Michelin's online guide. Assuming these are the same?). Not sure if I have XRV or XZE tires, since I don't have the rig here to look, but I will.

Need to pull out our recent weight chart and reassess based on actual weights from the recent CAT scales (nowhere in my area to weigh each corner, unfortunately). I suspect we'll still be close to the 90 psi though, even with our current weights.

There's so much to remember on all this stuff!
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Old 05-06-2013, 02:24 PM   #3
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I think that 90psi is a bit hard (rough ride) unless you are loaded to the max.

But if you don't mind the ride......

Enjoy your trip. Will you be checking in on the boards, or "off the air" until you return?

Roll
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Old 05-07-2013, 06:07 AM   #4
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Definitely need to check based on the actuals. My fear is that it's going to still put us as 90psi, but I'm no expert. We will definitely be loaded on this coming trip!

I'll be checking online as long as Verizon actually works where we're going! Last weekend at the Richmond, VA NASCAR race, it was fine for the first day, then none of us has a decent signal for the rest of the trip. The morning coffee is not the same without a side of RV Internet boards, LOL!!!
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Old 05-08-2013, 09:46 PM   #5
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Hi,

New here like 30 minutes ago. I just bought a 2013 Mirada 29 (the book says DS, but the logo on the side of the unit says ES) anyway. I'm taking it out for the first time loaded this weekend to Lake Casitas, Santa Barbara County, CA. From what I gather, TP and weight load distribution are important. I'll be going to a local truck scale on Friday morning. One thing I want to do is have "real" tire pressure extenders installed so that I can check out the inner rears without crawling under the unit.
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Old 05-10-2013, 08:01 AM   #6
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Quote:
Originally Posted by Hugh R View Post
Hi,

New here like 30 minutes ago. I just bought a 2013 Mirada 29 (the book says DS, but the logo on the side of the unit says ES) anyway. I'm taking it out for the first time loaded this weekend to Lake Casitas, Santa Barbara County, CA. From what I gather, TP and weight load distribution are important. I'll be going to a local truck scale on Friday morning. One thing I want to do is have "real" tire pressure extenders installed so that I can check out the inner rears without crawling under the unit.
Yup... that would be a pain. My coach came with some kind of kit that puts the valve access for the inside rear tire on the outside wheel. Glad it came that way. I would have probably skipped the option but see now that it's critical if you intend to monitor tire pressure, (which I found out actually is critical).

Roll
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Old 05-16-2013, 05:22 AM   #7
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Back from our first long road trip - ~10 hours one way! Was great until the ride home and I-95 was closed, adding 2+ hours on to the return trip! And, how nice to be in a motorhome with a bathroom only feet away, LOL!

According to Michelin's tire chart, we actually were in their recommended zone with the 90 psi front/rear based on our axle weights. (Why isn't there anywhere in the Northeast to weigh the four corners?!!). We technically could have dropped the front to 85 psi, but without knowing the exact weights, we left at 90.

We had some wind on the ride home as well (first time with any), and I'm very glad I threw on that Blue Ox Tiger Trak in the rear!

All-in-all the Encounter handled very well!
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Old 05-16-2013, 03:09 PM   #8
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We had some wind on the ride home as well (first time with any), and I'm very glad I threw on that Blue Ox Tiger Trak in the rear!
Okay, I'm struggling with that just a bit. Really?

Roll
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Old 05-16-2013, 04:16 PM   #9
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Well now, the dealer tech is the one who actually threw it on, LOL!!! I'm just taking all the credit since I provided all the info for them to do so.
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Old 05-17-2013, 06:20 AM   #10
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Originally Posted by go6car View Post
Well now, the dealer tech is the one who actually threw it on, LOL!!! I'm just taking all the credit since I provided all the info for them to do so.


Roll
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