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Old 02-19-2018, 11:37 AM   #1
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New Tires? New Truck?

We just got back from our first outing and now I have some questions. Here is our rig:

- 2016 GMC 1500 Denali w/6.2L
- 3,950# axle rating (F & R)
- 7,200# GVWR
- 15,000# GCWR

- 2018 Jayflight 29 BHDB (empty tanks)
- CAT weight 7,600#
- 9,250# GVWR

Fully loaded (empty tanks) CAT weights
- Front Axle - 3580#
- Rear Axle - 3620#
- Trailer Axles - 6,940#
- GCWR - 14,140#

WDH - Blue OX Sway Pro

Tow Vehicle has 'P' rated Wrangler SR-A - P275/55R20 which I ran at 47-48 psi (max sidewall is 51 psi)

Average top speed 60-63 mph

We towed from DFW to Houston going down HWY 6. I never felt out of control, however the truck felt like it was riding on 4 clouds instead of tires.

Here's my situation...We'll be going out roughly once every 1-2 months for a long weekend and 2-3 weeks during the summer. I'm debating right now if this truck is enough to pull this trailer. The engine has no problems...it's the payload and weight ratings that have me up at night as well as the 'floating feeling' when towing. I have a feeling this 'floating feeling' is because the truck is maxed out.

WWYD? New Truck? E-Rated Tires? No change?
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Old 02-20-2018, 05:16 AM   #2
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You will exceed with a fuller trailer, saw some new GMCs at auto show. Get a 3/4 for the higher load capacity maybe.
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Old 02-20-2018, 06:34 AM   #3
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I would go back to the scales with a fully loaded truck and trailer to find what your ready to camp weight. Then you’ll know what you are really dealing with. My guess is you’ll be very close to the payload capacity but over the GVWR. If you’re only going out once a month (and close to home) I personally would get the LT tires and just watch how much I load up. Others will chime in saying you need a bigger truck. If you head west to the mountains of Texas, a bigger truck would be in your best interest, but you should be fine on the flats with your current truck. JMHO


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Old 02-20-2018, 06:40 AM   #4
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P-rated is not a truck tire just a passenger tire.. you should look at an XL or D rated tire...I got a set of cooper ATP's, I hear the AT3's are pretty good too they go to 55 psi and a load rating of 114... that will take away all the floating feeling you are getting...
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Old 02-20-2018, 07:25 AM   #5
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Your TV is pretty new so changing tires might make the most sense. I’d expect switching to LT tires would make a big improvement.
However, if you expect contracting a case of “two foot- itis” maybe a TV upgrade could be argued.
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Old 02-20-2018, 09:28 AM   #6
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I agree with a D-rated tire. You should check your tire sidewalls for cracks and press them to max air. I had p-tires on my (2008 Tundra w/p255s) before I switched to LTs. You could add airbags or Timbrens to help handle the extra cargo load. Your truck is new enough to pull that beast.
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Old 02-21-2018, 05:37 AM   #7
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If trading in on a 3/4 ton gasser doesn't make sense financially, a set of LT rated tires will make a significant change in the way it feels and handles. You will still be close to max weight but you are within specs otherwise. I ran a set of LT Cooper AT3's on my Tundra while towing my 28BHBE and it made a huge difference. In the non-towing season, I switched back to the stock P255/70R18 Michelins which were like riding on a cloud. The truck empty felt a lot more stable with the LT's.
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Old 02-21-2018, 11:41 AM   #8
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Need to know your truck's scale weight vacation-ready without the trailer hitched vs. scale weight of your entire vacation-ready rig to accurately determine your vacation-ready tongue weight. To get a really accurate picture of what's going on, ideally you'd scale your entire vacation-ready rig with and without the WDH activated.

Too little tongue weight can result in a mushy, "cloudy" ride. The tongue weight may not be low enough to induce sway, but low enough to be mushy or "cloudy". Just something to consider checking before spending a whole lotta money on tires.
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Old 02-21-2018, 12:00 PM   #9
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Thanks for the replies. The insight helps.

From the volumes of information I've been reading over the last few days, I have confidence that a new set of proper towing rated tires would help with the 'squishy' handling.

What the tires don't help with is the weights I'm towing at. The truck is maxed out at factory ratings with the GVWR of 7,200# (fully loaded for camping) and the GCVWR is sitting with a little headroom at 14,140# (15K max)...so any extra weight we take on a trip MUST go over the trailer axles.

IF (big IF) I would upgrade the tow vehicle, I'm looking at a 1-ton Diesel Crew Cab short box - single wheel (it fits in the garage - otherwise I'd go long box)...1-ton simply for the extra payload for not much $$$...Diesel because if I'm going large, I'm going large...

As far as upgrading the RV...this will not happen for at least 10 years when the kids are not longer in the picture...we've spent the last 4 years looking at RV's to figure out what works best for our family at this time...

Wish I would have waited a little longer on the vehicle purchase, but...20/20 hindsight and all that...

So, the million dollar follow up question...

Given what you know today and the years of RV'ing you've done, would you bite the bullet and upgrade the tow vehicle now or get new tires and travel light?
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Old 02-21-2018, 12:04 PM   #10
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As Camp posted, you need to weigh the combo more to be able to figure all thof weights.

Follow the CAT Scale how to in my signature link for an in depth how to. Then post back with your results of the ready to camp weights. Then with all the weights you are armed to decide if a set of LT tires will be enough for how you camp, or if a bigger tv is needed.
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