Community Forums

baranski37 · 05-05-2019, 04:17 PM

Greetings, I recently had the truck and 5er weighed in Livingston with Smartweigh. The weigh master was a little concerned that the tongue/pin weight was low and asked if the trailer ever wandered going down the road. It does not even in steady cross wind. It was weighed with fresh tank full and truck had 48 gallone tank full. Can anyone point me towards a chart or brochure that would show proper pressure for Provider ST235/85R. I have been running at 100 psi though the sidewall shows 110 psi. Any thoughts or suggestions appreciated. I attached the weight ticket showing loaded and unloaded in case anyone is interested. Thankfully everything was within limits and I owe this site for much of that as I spent a year or so reading posts on here before purchase. If it matters the trailer is a 2019 KZ Durango Gold 380FLF

Regards,
Ron

Fulltimer · 05-05-2019, 06:50 PM

See if this helps:

Old-Biscuit · 05-05-2019, 11:01 PM

Your 5vr has a GVWR of 14,995#

Weight on 5vr axles is 11,950#
Pin weight is 2650# (difference between truck rear axle weights,,,,no change in front axle)
Total 5rv weight is 14,600#

Pin weight ratio is only 18%....which IS low. Typical wet pins 20-25%

5vr tires are rated at 4400# each at 110 PSI

You have 2900/2600 front axle & 3300/3150 rear axle
Running 100# is more then enough air pressure.

Check tire contact patch
Use some 'sidewalk chalk' and make a wide chalk mark across the tire thread
Move 5vr forward in straight line for 25'
Check chalk mark.....
*edges worn off more then center/not enough air pressure
*center worn off more then edges/too much air pressure
*even wear across thread....good air pressure

As for that Low Pin weight.......
you are close to 5vrs GVWR so you can't ADD much so maybe MOVE more stuff into basement compartment (forward of axles)

IS 5vr LEVEL when towing?
Rear axles on 5vr are heavier then front axles which makes me think 'nose high' which will be lower pin weight

I tow 14K 5vr (13,873# scaled)....pin is 3080# (22%) and is level when hitched

FastEagle · 05-06-2019, 11:00 AM

Don't get caught-up with misinformation from the commercial tire side of the house. Your trailer was built to FMVSS specs and the correct inflation pressure for the tires is on the vehicle certification label, tire placard and further explained in the vehicle owner's manual. Fooling around with Original Equipment tire inflation pressures for RV trailers has proven, over the years, to be fatal for the tires.

baranski37 · 05-06-2019, 12:41 PM

Thanks Old Biscuit, it pulls near to level at most 2" high in front. I use a 16K Reese goosebox and had to have dealer adjust bolts from low to high (just two options) to get the 5"-6" clearance at the truck bed. Again thanks for the analysis.

kedanie · 05-07-2019, 09:08 AM

Quote:

Originally Posted by FastEagle

Don't get caught-up with misinformation from the commercial tire side of the house. Your trailer was built to FMVSS specs and the correct inflation pressure for the tires is on the vehicle certification label, tire placard and further explained in the vehicle owner's manual. Fooling around with Original Equipment tire inflation pressures for RV trailers has proven, over the years, to be fatal for the tires.

What misinformation?!! Try being a bit more specific

Sounds like the OP is getting good advise.

Keith

rick gorman · 05-07-2019, 03:34 PM

Good comments, I would add, keep your speed down to 65 max. I will be replacing a set of G614 good year tires soon. Never heard of the provider, they have a higher load rating which is what I need

Old-Biscuit · 05-07-2019, 07:24 PM

Quote:

Originally Posted by rick gorman

Good comments, I would add, keep your speed down to 65 max. I will be replacing a set of G614 good year tires soon. Never heard of the provider, they have a higher load rating which is what I need

Check out Saliun S637 tires
Alternative for GY G614s and not as expensive

https://www.sailuntire.ca/MRT/S637.html