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Old 07-16-2019, 06:26 AM   #29
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The new 2020 GM 2500 and 3500's are now hitting the dealer lots. They are now bigger trucks as they have a over a 5" wheelbase increase. They are taller with a new 6.6 gas engine and a reworked 6.6 duramax diesel with increased capability.

I will go look at these trucks because I want to see how big they are. I might have to change my perception of SRW trucks if they add enough cargo capacity.
I think the major limiter is tire capacity. No matter how strong the engine, frame, suspension is you still only have 2 rear tires on a SRW and it's tough to find more than load range E.

When rear axle weight is at max with heavy pin weights, tire wear is exponential. My buddy hauls a 16k 5er with his GMC 2500HD (which is surely overloaded but he doesn't wanna hear it). He was complaining about needing 2 rear tires although he rotates every 6000-8000 miles. After discussing it he said he did finally make some mileage with the 5er, not "that" much, maybe 4000-5000 miles, but it was enough to wear down a major part of his rear tires.
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Old 07-16-2019, 07:21 AM   #30
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g and h rated tires are readily available. just go to a 19.5 wheel. lots of capacity then.
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Old 07-16-2019, 11:03 AM   #31
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I was wondering if you could put 19.5" wheels/tires on a LDT SRW. How that would change the driving dynamics and what, if any, negative effect it would have.

It Would bump the tire capacity above the axle rating in most cases. Tire capacity would jump to over 8,000lbs.
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Old 07-16-2019, 05:02 PM   #32
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g and h rated tires are readily available. just go to a 19.5 wheel. lots of capacity then.
Not a very common or popular mod here. In fact, I don't think I've ever seen one like that. I have seen maybe 2 or 3 with semi type (Alcoa?) wheels. Looks weird to me.

The logical thing when getting up there in payload is a dually.
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Old 07-16-2019, 05:13 PM   #33
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I think the major limiter is tire capacity. No matter how strong the engine, frame, suspension is you still only have 2 rear tires on a SRW and it's tough to find more than load range E.

When rear axle weight is at max with heavy pin weights, tire wear is exponential. My buddy hauls a 16k 5er with his GMC 2500HD (which is surely overloaded but he doesn't wanna hear it). He was complaining about needing 2 rear tires although he rotates every 6000-8000 miles. After discussing it he said he did finally make some mileage with the 5er, not "that" much, maybe 4000-5000 miles, but it was enough to wear down a major part of his rear tires.
Absolutely - the SRW's wear through tires much faster towing heavy. I think we did about 20-25k on our last set while full timing, so towing figure 50% of the time. Always rotated and they wore evenly. When unloaded the front tires wear faster (diesel) and when loaded the rears do...
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Old 07-21-2019, 04:59 PM   #34
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My 2 cents:
You have to have a dually, so look for used dually. haunt Craigslist, internet site; e.g., Kelly's blue Book, Rv sites; e.g., RVtrade.com. RV dually's are generally gently used. I'm a Ford guy but YMMV



never undersize your tow vehicle. If your budget can't afford the upgrade, love what you've got.
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Old 07-21-2019, 05:11 PM   #35
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A lot of people make it sound like going to a DRW is overkill, or to be avoided. From a cost standpoint, they are not much more than a SRW 1-ton. I went through the same decision making process when I only had a 14Klb 5th wheel. Writing the check for a DRW was tough, but I have never regretted it. It makes pulling a large rig so much easier. For me, when I had the 3/4 ton I could tell that I was at it's limit and I found it stressful. Two things. One, look for a 4.10 rear end. That will greatly increase your towing capacity. Read the specs sheets on towing capacities and you might be surprised what a difference the gearing on the rear end makes. Second, check with your DMV. In some states (I live in CA), when you go >15K you need a Class A license. Maybe where you live it is different. If you buy that particular 5th wheel, with a 16K weight rating, take it to a scale and weigh it. It will probably never weigh that much unless the tanks are full. I got lucky when I upgraded to a similar 40' 5th wheel rated at the same weight. Loaded as I normally travel, I was 290lbs. under 15K. I carry that weight sheet with me in case I am ever stopped by a diligent highway patrol officer.
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Old 07-21-2019, 05:53 PM   #36
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You're talking 350/3500 and an 8 foot bed. Gas or diesel is your choice - diesel costs more in many states with it's higher road trucker tax. Also, diesel is an $8,000 option on most trucks and they do require more maintenance, but diesels get better per gallon mileage.


Personally, I pull 12,000 with a 2017, 2500HD plain white, gasser, work truck.
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Old 07-21-2019, 06:01 PM   #37
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Made a deal for a 2019 Silverado 3500, crew cab, work truck, DRW with the duramax. It was cheaper than a 2500 with the same options. Dealer said they aren't in high demand so they end up being less. Thank you everyone for your input and experience! I will post pics when I get it.
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Old 07-21-2019, 07:56 PM   #38
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I would not consider anything less than a diesel dually to haul a 40 ft 5er for practicality & safety. I tow a 34 ft 5er that weighs 18,200 lbs with a 2017 F350 Platinum 6.7 diesel with 3.73 rear end ratio. It hauls beautifully with little effort. I get over 14mpg when not towing & 10-11mpg when towing. One of the biggest considerations is the size of your brakes. You need BIG brakes & the stable rear end of a dually to stop a 40 ft 5er. The Ford 6.7 diesel engine has been around for about 9 years & has proved to be a good engine, so a used low mileage F350 diesel dually would be a good option.
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Old 07-21-2019, 09:50 PM   #39
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The 2020 GM looks very promising. I'd wait for the 2021 model though.
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Old 07-22-2019, 08:19 AM   #40
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New truck for 16,000 5th wheel.

I was towing my 14,800 lb 5th wheel with a 2014 F-250 diesel; rated at 15,500. In order to travel across the country, I moved 'up' to a 3500 dually (good for 21,500) and now am much more comfortable for longer trips. I will say the F 250 towed with no problems even up long climbs into the mountains. I thought I heard the 2019 F 250 diesel was rated at 19,500 which would be good for what you are looking for. Not too many on the used lot and the new ones with any nice options are not inexpensive. Good luck, and safe travels.
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Old 07-22-2019, 09:38 AM   #41
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I was towing my 14,800 lb 5th wheel with a 2014 F-250 diesel; rated at 15,500. In order to travel across the country, I moved 'up' to a 3500 dually (good for 21,500) and now am much more comfortable for longer trips. I will say the F 250 towed with no problems even up long climbs into the mountains. I thought I heard the 2019 F 250 diesel was rated at 19,500 which would be good for what you are looking for. Not too many on the used lot and the new ones with any nice options are not inexpensive. Good luck, and safe travels.
Similar numbers here too. 13k trailer, F250 diesel.
Now towing a 16,500 GVW 5th wheel with a 2019 F350 DRW. It fits my personal criteria of the trailer being no more than 85% of the tow vehicle capacity. This "formula" has worked for me for the past 15 years.
It didn't take me long to get comfortable driving the much larger truck. Yes, I do have to park "out there" at WallyMart or wherever, but that is a very minor issue for me. The trade off for handling, towing comfort, safety, and confidence is well worth it. Besides, it seems that being more aware of the size has made me a more alert and better driver. (According to my copilot/navigator, who also will drive sometimes.)
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Old 07-22-2019, 09:45 AM   #42
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Tow rating is only part of the towing equation. A F-250 diesel does not have the cargo capacity to tow a big 5th wheel.
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