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Old 07-09-2012, 06:50 PM   #295
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Originally Posted by nilesrob View Post
Awesome, thanks Phoenix.

Since determining the proper tire pressure seems to be so related to trailer weight, have any of you found (inexpensive) portable scales? I've looked online and all I've seen are exorbitantly expensive (for my purposes).
Tire pressure -- no matter the type, brand, rating, etc -- is always sidewall maximum cold pressure.

Again, in the "Revised" thread here (linked to the RV.net discussion with two tire engineers and others) a trailer is "pushed around" in turns and backing, stressing sidewalls. We've all seen this. Thus the reason for the pressure rule. Potholes, curbs and the rest do their damage, and the (generally) lower amount of suspension travel on a trailer means the tires have a harder job than those on the TV, in some respects.

The difficulty is in matching load rating to actual load (GVWR and sometimes greater when WD is applied on a trailer at maximum). One can just buy "E" tires, for example, but it would be better to come closer to actual need plus 12-15% load reserve.

As with dialling in hitch rigging, just do a few more weigh tickets on a CAT Scale of the wheels as possible. Maybe only port/starboard is possible, but if there is room (don't forget backing onto scale, some are at ground level) then it may be one can get all four individually. I'd do it after hitch rigging is dialled in. A level trailer with WD properly applied is the test.

.
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Old 07-09-2012, 07:20 PM   #296
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Phoenix,

There is a Flying J Truck stop that has a scale on the South side of I-10 and 67th Ave. For under ten bucks they will weight your TV and trailer give you weight on all axles and total weight.

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Old 07-10-2012, 05:28 PM   #297
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Quote:
Originally Posted by REDNAX View Post
Tire pressure -- no matter the type, brand, rating, etc -- is always sidewall maximum cold pressure.

Again, in the "Revised" thread here (linked to the RV.net discussion with two tire engineers and others) a trailer is "pushed around" in turns and backing, stressing sidewalls. We've all seen this. Thus the reason for the pressure rule. Potholes, curbs and the rest do their damage, and the (generally) lower amount of suspension travel on a trailer means the tires have a harder job than those on the TV, in some respects.

The difficulty is in matching load rating to actual load (GVWR and sometimes greater when WD is applied on a trailer at maximum). One can just buy "E" tires, for example, but it would be better to come closer to actual need plus 12-15% load reserve.
Ross, that's the best explanation I've seen for your position that we should use maximum tire pressure. As I'm sure you know, I run ours at 72 lbs. With 80 lbs., do you see the center tread wearing faster?

Gene
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Old 07-10-2012, 06:00 PM   #298
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Huge help, thanks all for your advice and guidance on this thread. Am going with Michelin 16" LTX, have tires and wheels on their way.

Side note: My tire guy told me if I wanted the XPS Ribs, they would have to be sourced out of the country - just none available at least in the size needed. You guys must have put a run on the market!

Thanks again all.
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Old 07-10-2012, 06:02 PM   #299
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Am going with Michelin 16" LTX, have tires and wheels on their way
You won't regret it.
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Old 07-10-2012, 08:06 PM   #300
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Ross, that's the best explanation I've seen for your position that we should use maximum tire pressure. As I'm sure you know, I run ours at 72 lbs. With 80 lbs., do you see the center tread wearing faster?

Gene
Gene, thanks. I don't know as it will wear faster. It's one trade-off, possibly, thus the problem of finding a tire that meets all criteria in the "correct" load range. We'd have to run a lot of miles in 5-years assuming a best quality tire for it to matter. I use a tread depth gauge on my truck to annually check wear (tire rotation is at 25k intervals) and would do the same with trailer tires.

We can work with an assumed axle average on the one hand, that -- TT loaded to GVW and WD applied -- makes for the highest tire loading. We just don't know it with the certainty of weighing each position . . independent suspension doesn't "share" itself longitudinally or latitudinally as does leaf sprung suspension. Thus the new suggestion from the "Revised" thread about using the certified weight scale for tire loading on each vehicle, not just hitch rigging data. (Ideally, done "empty", "loaded" and "loaded, with WD applied"; but it is the last matters most).

With an 80-psi tire the percentage change to 72-psi is low in comparison to a 44-psi tire lowered to 36-psi. I'd be most concerned with "equal" pressure on a long day. And the lower load range tire is more quickly affected (is the thinking as I understand it).

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Old 07-11-2012, 04:56 PM   #301
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Ross, when I had 68 lbs., there was slightly more wear on the outside of the tread, then I increased pressure to 72 sometime last year. So far, I haven't driven enough miles to make a difference, so I'll check again with the gauge later this summer.

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Old 07-11-2012, 06:54 PM   #302
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I am not a tire Guru eventhough my brother is a huge wholesale tire dealer....I run 72 lbs in my 16"- XPS Ribs and don't find anything unusual anywhere except I don't have belt separation, as I did on 9 GYMs and my tire pressure doesn't vary... I haven't added air in 6 mos...and we are now NYS residents and get a lot of Temp variation....My tire wear is such that it does'nt really show....I'm sure XPS Ribs are not so rare as stated ,and I am sure my brother probably has them in his wholesale warehouse..."Terry's Tire Town" -- Alliance, Ohio... but I see nothing wrong with the LTX M/S tire....I have run them on my SUVs for years.....and in fact have one for my spare on the AS.....
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Old 07-11-2012, 07:14 PM   #303
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Do these wheels make me look fat?

Booyaah. New wheels and tires. Don't know if they look better, can't tell if they ride better, but I sure FEEL a whole lot better.

Before picture (with my favorite plastic gray thing).

After picture (16" LTX)

15" wheels and tires for sale if anyone interested (PM me).
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Old 07-11-2012, 08:54 PM   #304
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Very Nice!

Quote:
Originally Posted by nilesrob View Post
Booyaah. New wheels and tires. Don't know if they look better, can't tell if they ride better, but I sure FEEL a whole lot better.

Before picture (with my favorite plastic gray thing).

After picture (16" LTX)

15" wheels and tires for sale if anyone interested (PM me).
Love the look! And the grey plastic thing. I think I NEED one of those....
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Old 07-12-2012, 11:28 PM   #305
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For those interested, the gray thing is a Rhino Ramp. Great tool to keep with you - no lift needed if you run into a flat for whatever reason. And dogs love them too. Don't remember where I got it, sorry.
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Old 07-13-2012, 05:55 AM   #306
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"Do these wheels make me look fat?"

LOL. Maybe it's because I know it's properly outfitted, now... but the proportions just look better with 16" rubber

Enjoy!

PS. those ramps are great, only problem is they take up way too much space...
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Old 07-21-2012, 11:37 AM   #307
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ST Tire Problems?

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I've been running Maxxis E's for the last 48,000 miles. I'm just fed up with ST tires.

Brian

I'm trying to learn and figure out what tires to buy. Why did you get fed up with ST tires? Is there something about them I should know?

Thanks,
Doug
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Old 07-21-2012, 11:43 AM   #308
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Doug,

Use the search function and search goodyear marathon, st tires, etc, and you will have all the reading you can handle! Many, many complaints about various ST tries, especially in hot area of the country.
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