Community Forums

buckeyeduffer · 04-29-2010, 09:48 PM

Tuscany Owners:

Just installed tire pressure monitoring sensors that came with the RVNavgation System we installed recently. Checked all tire pressures before installing per instruction and all were within +- 3psi of 90 psi. As the drivers side was in the morning sun they read higher than the shaded side of the MH so I made a guess that all were set right at 90 psi.

I have not weighed the rig but but would like to get some feedback from ya'll as to what pressure you are carrying. 90 psi seems low to me but ride seems fairly firm and tires do not seem to be heating a whole lot (eg: gaining pressure on the road). Leaving Arizona last week with ambient temps at 88 degrees or so, pressures came up on front tires to approximately 103 psi on sun side of MH and about 99 psi on shade side.

I want to get weighed soon and refer to tire OEM inflation instructions, but thought you guys might have more experience at this than we do.

Thanks in advance

Elkhartjim · 04-30-2010, 07:24 AM

Quote:

Originally Posted by buckeyeduffer

Tuscany Owners:

I have not weighed the rig but but would like to get some feedback from ya'll as to what pressure you are carrying.

I want to get weighed soon and refer to tire OEM inflation instructions, but thought you guys might have more experience at this than we do.

Thanks in advance

That's my experience, until you get it weighed your guess is about as good as mine. I run 95 front and 85 rear for "my" motorhome for the weight I carry in the front and rear.
Until you get it weighed just make sure you have enough pressure...ever how much that might be.

powerboatr · 04-30-2010, 01:20 PM

i run 95-98 up front
and 90-95 out back
could prolly lower the rear a bit.
i am 10200 on the front axle and just over 19k out back plus or minus depending on water and groceries

teacher · 05-01-2010, 04:56 PM

Based on weights at J-scale fully loaded including tow dolly and car I run at 95 psi all the way around. A few pounds less in the rear could still be within the the Goodyear guidelines, I figure the extra pound or two might help with mpg a bit and not hurt the ride at all. Seems to work out quite well.

The Woodieboys · 05-04-2010, 08:45 PM

Weigh it and go by the guidelines. But I was also told by the Goodyear dealer that it is bad for the tires to run too low (30% of the max weight) in them. We run at 95 lbs front and rear (weigh it once a year just to be sure).

buckeyeduffer · 05-06-2010, 11:21 PM

We weighed out at 18,200 rear and 11,400 front so loaded tires to 95 all the way around. Thants for the feed back from all.

powerboatr · 05-07-2010, 02:28 PM

Quote:

Originally Posted by buckeyeduffer

We weighed out at 18,200 rear and 11,400 front so loaded tires to 95 all the way around. Thants for the feed back from all.

what are you toting up front? a big snack tray

buckeyeduffer · 05-08-2010, 09:36 PM

I was kinda suprised at the front-back differential as well but they assured me weight was correct. We do not carry a lot ofh heavy stuff forward. In fact am planning to cull the understorage some more.

powerboatr · 05-09-2010, 10:02 AM

Quote:

Originally Posted by buckeyeduffer

I was kinda suprised at the front-back differential as well but they assured me weight was correct. We do not carry a lot ofh heavy stuff forward. In fact am planning to cull the understorage some more.

I was surprised at the "lightness" of our front end, we have two heavy slides right there up front.

my two forward basement bays have light items and most of the "junk" we carry is centered in the center bay.
I stopped carrying more than 1/3 water,

tthrower · 07-05-2010, 01:46 PM

I have a 2007 Tuscany with 275/70R22.5 tires. I noticed that the pressures that people are posting in the thread are running around 95 psi or so. I realize that the weight is a critical item for determining proper pressure. The tire guide that came with my moho shows 120 or 125 maximum cold psi. The dealer had told me to run 110 to 115. Does that sound correct as a rule of thumb? Again, realize I need to weigh each individually but that seems like a big difference from 95 psi. Any ideas?

Thanks

Terry

powerboatr · 07-05-2010, 05:11 PM

you answered your question
only after you weigh it road ready will you know what pressure you could be running

The Woodieboys · 07-05-2010, 08:53 PM

Weigh, weigh, weigh. Once we weighed and dropped the PSI to 95 from 105 I noticed a big difference in how the coach handled better.

And at least you are trying to understand the PSI and checking the tires. Most important thing to do in my opinion after checking the oil.

buckeyeduffer · 07-18-2010, 11:11 PM

Quote:

Originally Posted by The Woodieboys

Weigh, weigh, weigh. Once we weighed and dropped the PSI to 95 from 105 I noticed a big difference in how the coach handled better.

And at least you are trying to understand the PSI and checking the tires. Most important thing to do in my opinion after checking the oil.

Agree completely. We weighed and reduced pressure to 95 PSI as well.

On another note had some weired steering tire wear this trip. (Utah, Idaho, Yellowstone, Tetons). At 17.0k miles on coach, both front tires wearing (outside on right front and inside on left front). Had them put on the back left and brought the rear forward for steering and then revisited the allignment which was out by .22. Went on to Yellowstone and back to Boise, and had a much better ride and handling. Really disappointed as I just had a four wheel allignment in Tucson at 8.0k miles.

During this process was talking to another Freightliner XC owner and he stated he had had similiar problems with the Goodyear tires and allignment issues.

Additioanlly, he told me that during his tire rotation rebalancing, allignment etc, he had powder installed in the tires for balancing vs. the wheel weights, and that resulted in a much quiter ride.

Doe anyone else out have experience with powder balancing vs. wheel weights?