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Old 04-05-2019, 02:16 PM   #11 (permalink)
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Originally Posted by Hersbird View Post
I don't think anybody has answered the question. Not is 1 or 2 axles better for towing, but does 2 axles and 4 tires have say twice the rolling resistance of 1 axle and 2 tires? I wouldn't think twice as much as they will be carrying 1/2 the load and can be done with lower mass axles, wheels, and tires compared to a single heavy duty axle, wheels, and tires. It will be more though but any of this is small compared to potential aero drag of what you put on the trailer, or the huge hit you get crawling around off road even without a trailer.
RR doesnít mean much with trailers. Itís the aero penalty. Unlike a car with work commute and shopping, an RV spends little engine time off highway. Generally.

The tracking stability of Tandem means fewer steering corrections. Etc. Itís just easiercin every situation. ESPECIALLY backing.

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Old 04-05-2019, 02:22 PM   #12 (permalink)
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Yes. I used to have a 7000# featherlite toyhauler with all the amenities I towed with a cummins van and got 15 mpg average. It was sweet and I regret selling both, but it was to big to pull where I want to go and I need 4x4.



I talked to a couple who drove the Yukon trail pulling a bigfoot fiberglass camper. They bent both axles, so I don't want to screw around.

I'm guessing the new 7x16 toyhauler dry will weigh around 3k. Then loaded down with a finished interior, a couple motorcycles and tools and as much glamping gear I can cram in there. Then 100 gallon shower water tank which wont be full, usually.. A 20 gallon drinking water tank. All that crap might weigh 5k so I'm up to 8k or about 75% of capacity which might ride rough.. Hence de-leafing, but this is all speculation. Weight might add up quicker than I think. Maybe it will ride great as is, but I'm thinking I want longer leaf springs if using a single axle, or something to help the ride..



Exactly.. But the offset of truck rims, mine being 17", is a little more than the centered trailer rims I think so the tires would be to close to the wheel wells or rub. Plus the truck center hole is smaller than the trailer rim center hole. Two hurdles.. And are trailer studs 9/16"? Walter at Jensen trailers said he would use wheels I supply but I haven't figured out how, or how large to enlarge the center hole.



I'll use a straight axle. But using trailing arms/panhard bar with airbags or longer leafs would be nice.

Blowing a tire is definitely a concern. Especially since this is a narrow track trailer, meaning no fenders, and the wheels are under it in wheel wells. So, a 7' wide trailer that's over 8' tall? Yeah, I think you just convinced me to use tandem axles. But that limits what type of suspension I use to the stock 2' leaf springs.

The "gap" between the TV and Trailer is responsible for about 25% of the drag of the combo. Possibly this is the area that would yield the most mileage gain. Also no surprise, this would be the most complicated because of the articulation and clearance.
Torsion axles. Period.

And disc brakes.

100-gal Water way way way too much. Maybe 45. Too much weight when full either moving or stationary.

Suggest you spend more time looking at whatís out there retail. Donít get far away in design. Stay very close. Trailer engineering is serious business.

.
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Old 04-06-2019, 12:10 PM   #13 (permalink)
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8K+ is a hell of a lot of weight for two tires. Even the 235/85/R16 trailer tires my workplace sells wouldn’t be enough to carry that weight at 110 PSI. Those things have sidewalls at least an inch thick too. Whatever you get, bring a temperature gun and make sure the tires aren’t getting above 180F. Preferably lower.
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Old 04-08-2019, 05:18 PM   #14 (permalink)
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Originally Posted by Daschicken View Post
8K+ is a hell of a lot of weight for two tires. Even the 235/85/R16 trailer tires my workplace sells wouldnít be enough to carry that weight at 110 PSI. Those things have sidewalls at least an inch thick too. Whatever you get, bring a temperature gun and make sure the tires arenít getting above 180F. Preferably lower.
Yes and good thing I started adding worst case scenario weights. I doubt it would ever weigh 8k and I was thinking 9k axle, but didn't think tires..

Two axles will be installed..

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