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Open Roads Forum  >  Truck Campers

 > 19.5" Tire Comparisons

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n0arp

FT

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Posted: 03/18/21 09:08am Link  |  Quote  |  Print  |  Notify Moderator

I've been running a DRW for the last couple years, and prior to that had a SRW with 19.5s on it. I'm looking at possibly upgrading the DRW to 19.5s in the near future.

Currently running OE size 235/80r17 Goodyear Duratrac tires.

I ran Michelin XDS2 245/70r19.5 tires on my old truck, which were great on the road, but somewhat lackluster off pavement. A decent AT. I'm currently looking at the Toyo M608Z, Cooper RM253, and Goodyear G622 RSD tires, as well as considering any others I see with more aggressive treads.

We bought the truck camper to take further off the beaten path than we were going in our fifth wheel, and don't want to lose a bunch of that ability due to tire choice. Having run them before, I'm aware of the limitations that these have and understand that there will be compromises. I just want to minimize them.

For those of you who have 19.5s, what tires are you running, how do you use them, and what are your thoughts on them? There are a lot of reviews out there, but very few that I can find that actually discuss tire performance specifically in loose dirt (not sand that would require airing down), mud, and snow.

As an aside, I added Supersprings SSA24 leafs to my truck yesterday, and now the ride height with the truck camper is the same as the unloaded height before. A bit higher than I was going for, but I'll take it. Haven't driven it yet... The AirLift 7500XL bags could barely lift the camper and are still in place, but now can lift it with ease. Don't waste your money on those, except maybe to use for side to side leveling. Blargh.

Edit - I'm also strongly considering a larger LRE tire, such as 275/65r20 or 295/65r20 Cooper STT Pros on aftermarket DDC wheels. The wheels would be the limit then, with the fronts @3,500lbs/ea compared to the 3,085lb load rating of the factory tire size. The main concern with 275+ tires is fitting between the jacks of the camper.

* This post was last edited 03/18/21 10:03am by an administrator/moderator *   View edit history


2019 Ram 3500 HO/AISIN CCLB DRW Longhorn
2020 Jeep Wrangler Unlimited Rubicon 2.0T (follow or TC toad)
2015 Keystone Alpine 3730FB 2925W/22.8kWh, 30K multi-split
2016 Arctic Fox 1140 WB 1800W/11.4kWh

Grit dog

Black Diamond, WA

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Posted: 03/18/21 09:56am Link  |  Quote  |  Print  |  Notify Moderator

Good morning.
Your comment about the airbags leads me to believe something was not right with your setup. Capacity/lift is a function of pressure and those bags should easily take all the camper weight right off the springs and actually start pulling on the springs.

Regarding 19.5s I’ve only used them (a lot) in commercial applications, construction work. Wouldn’t be my first choice or second choice for rough/off road/ low traction conditions. They are not good all purpose tires as much as LT tires.
I’m sure they can be tailored better to the specific use better than a fleet of construction trucks, but ....
Question, why are you considering upgrading? Based on your signature, I don’t see anything remotely needing 19.5s with a dually.


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29

jimh425

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Posted: 03/18/21 10:13am Link  |  Quote  |  Print  |  Notify Moderator

I wouldn’t change to 19.5s to go offroad. I think you’d be better off with a 20 conversion since there are far more options for tires, and they can be aired down, or simply stay with 17s. Generally smaller rims are better offroad with more sidewall. You may need to add spacers for the rear.

You could also consider Super Singles.

I’ve run Hankook DH01s and Bridgestone M724s. My next tires will probably be Toyo M655s.


'10 Ford F-450, 6.4, 4.30, 4x4, 14,500 GVWR, '06 Host Rainer 950 Dbl Slide, Torklift Talon tiedowns, Glow Steps, and Fastguns. Bilstein 4600s, Firestone Air Bags, Hankook DH-01 225/19.5 Fs, Curt front hitch, Energy Suspension bump stops.


n0arp

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Posted: 03/18/21 10:17am Link  |  Quote  |  Print  |  Notify Moderator

jimh425 wrote:

I wouldn’t change to 19.5s to go offroad. I think you’d be better off with a 20 conversion since there are far more options for tires, and they can be aired down, or simply stay with 17s. Generally smaller rims are better offroad with more sidewall.

I’ve run Hankook DH01s and Bridgestone 724s. My next tires will probably be Toyo M655s.


Yeah, i've been strongly considering converting to 20s and running a 275 or 295 tire. I edited my post to reflect that and my concerns with doing so. With a 500lb winch bumper, backseat full of tools, and heavy camper, we're asking a lot of the front tires and I want a larger buffer there. I need to get to the scales, but I'm sure we're close to or over the limit.

jimh425

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Posted: 03/18/21 10:18am Link  |  Quote  |  Print  |  Notify Moderator

I edited my post since I left out Super Singles.

n0arp

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Posted: 03/18/21 10:31am Link  |  Quote  |  Print  |  Notify Moderator

I called DDC wheels and they said it should measure 102.75" wide with a 11.5" tire. I think that's going to be a no go, but I need to measure.

Edit - 104" between the jacks and about 98" between the outer tire sidewalls as it sits now, so we have 3" on each side to work with. Cooper STT Pro 275/65r20 tires have a 10.9" section width, so those may be the way to go.

* This post was edited 03/18/21 10:39am by an administrator/moderator *

Grit dog

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Posted: 03/18/21 01:06pm Link  |  Quote  |  Print  |  Notify Moderator

Makes sense, you’re need more capacity up front for your application.
And can’t go hog wild in back due to jack clearance and you really don’t want to widen your rear stance on a dually for off the beaten path, possibly tighter conditions.
Agree, 20s might be the best of both worlds. If you’re already going to invest a significant amount into aftermarket wheels, maybe consider removing the front dually adapter and running a matching conventional rim up front like a srw truck. Then you could effectively maximize the tread width/tire capacity up front and run skinnier but same diameter tires in the back.

Sorry, this is off topic from the 19.5s.

n0arp

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Posted: 03/18/21 01:43pm Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

Sorry, this is off topic from the 19.5s.


I've already taken the whole thread off-topic, seriously looking at 275s on 20s now. That would provide more capacity than the front wheel ratings, which are 3500lb/ea, for 7K front axle tire capacity (up from 6170).

I considered looking at staggering tire sizes but I think this provides all the additional capacity I'm looking for.

For the spare, looking at mounting a cheap 255/80r17 on the factory spare rim, because it's only 3% smaller in diameter than 275/65r20, so close enough to limp by on.

* This post was edited 03/18/21 02:17pm by an administrator/moderator *

Grit dog

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Posted: 03/18/21 02:30pm Link  |  Quote  |  Print  |  Notify Moderator

275-65-20 is a great combination of larger diameter, not so wide and good load rating.
Bonus is, they are not as popular of a size, so the prices are comparatively cheaper than similar load rating wider tires.

n0arp

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Posted: 04/16/21 09:14am Link  |  Quote  |  Print  |  Notify Moderator

I never really did anything on this, timing just hasn't been right with everything being backordered and us pouring money into other projects.

I found a new 19.5" tire to add to my list. Has anyone run them?

Manufacturer web page
Youtube off-road demonstration w/ F-450

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