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 > The shorter the center of gravity, the better right?

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Bedlam

PNW

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Posted: 04/24/20 11:56am Link  |  Quote  |  Print  |  Notify Moderator

A short bed camper can be carried on a long bed truck, but the CG of a long bed camper causes problems on a short bed truck. I had a short bed Ford truck and Arctic Fox camper. I went to a long bed Ram and was still able to use the short bed Arctic Fox until I saved for my current long bed Host camper.


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nlol

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Posted: 04/29/20 10:49pm Link  |  Quote  |  Print  |  Notify Moderator

Most short bed campers do not fit to the front of the bed. They try to make up for lost inside space due to their short length by filling out the bed area behind the wheelwells and/or extending the rear of the camper. Most will hang off the rear of a longbed just as much as the rear of a shortbed.

iwanttoretireearly

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Posted: 04/29/20 10:55pm Link  |  Quote  |  Print  |  Notify Moderator

nlol wrote:

Most short bed campers do not fit to the front of the bed. They try to make up for lost inside space due to their short length by filling out the bed area behind the wheelwells and/or extending the rear of the camper. Most will hang off the rear of a longbed just as much as the rear of a shortbed.


interesting... good to know

StirCrazy

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Posted: 04/30/20 08:18am Link  |  Quote  |  Print  |  Notify Moderator

one thing I haven't seen mentioned is to watch how far that center of gravity is in front of your rear wheels, the more it is closer to the front the greater percentage of weight that is transferred to the front tires. I end up blocking mine back about 3" from the front of my box to keep the COG about 2.5 to 3.5" ahead of my rear axel. I don't suspect I have a short box model as its a 10' but I do suspect the newer ford boxes are longer than the older ones and even shifted back the amount I do there is only 1/2" between my tail lights and the trailer overhang.

Steve


2014 F350 6.7 Platinum
2016 Cougar 330RBK

Kayteg1

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Posted: 04/30/20 08:46am Link  |  Quote  |  Print  |  Notify Moderator

I think blocking 3" on front to move COG is extreme. I
can get the same result by moving liquor from front to rear of camper.





Siletzspey

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Posted: 04/30/20 06:29pm Link  |  Quote  |  Print  |  Notify Moderator

When towing boats and trailers, the general rule is 10% of the weight onto the hitch for stability and other reasons. Is there a similar rule-of-thumb for truck campers in a truck bed?

My 9'6" NL in a long bed F350 SRW puts about 10% on the front axle, and 90% on the rear axle. I'm at 88% capacity of front axle rating, and 95% rear axle rating.

--tg

nlol

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Posted: 04/30/20 10:57pm Link  |  Quote  |  Print  |  Notify Moderator

None that I know of, but there can be a trailer towing issue with a camper that extends beyond the end of the bed. Many people use an extension bar. That's ok if the trailer is light weight. With a heavy trailer though, aside from the fact the bar may not be strong enough to carry the weight, when the truck turns the trailer has a more leverage pushing the rear of the truck around. If the trailer is heavy the solution is to lengthen the trailer tongue enough to clear the camper. Putting a heavy trailer on an extension bar is asking for trouble - makes backing up more difficult too.

StirCrazy

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Posted: 05/01/20 05:38am Link  |  Quote  |  Print  |  Notify Moderator

Kayteg1 wrote:

I think blocking 3" on front to move COG is extreme. I
can get the same result by moving liquor from front to rear of camper.


if you were talking about me, so do I. the blocking so much isn't for the COG but rather so I don't smash my tail lights out loading or driving down the road. with that blocking I only have 1/2 to 3/4" between my tail lights and the rear overhang of the camper.

having to put 3" of lift on it so I have clearance between the cab and the front overhang is a pain also.

Steve

kohldad

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Posted: 05/01/20 06:32am Link  |  Quote  |  Print  |  Notify Moderator

The Lance 815 I know of for sure and I've seen a couple of others that did the same to handle the difference between the truck bed lengths. On the 815 and it's the only model I know of which they did this with is have pods that bolt onto the rear of the camper when you put it on a short bed truck. The pods gave a little extra storage but more importantly had built in lights. Because the camper was very light at only 1,600#, having the COG a few inches outside of the recommended truck's COG was not a problem. Moving the camper 18" on my LB truck will only shift about 300# from the front axle to the rear axle.

So on a long bed truck, you had the option of removing the pods and letting the camper slide all the way forward in the bed which meant the camper stopped at the rear bumper. Or, you could put a spacer in front of the camper so it sat back 18" allowing you to leave the pods on.

On a short bed truck, you left the pods on which provided tail lights at the rear of the camper and the camper stuck out 18".

Any other short bed camper can go on a long bed truck because the differences in the bed lengths are all in front of the axle. So the difference in the relationship between COG and rear axle is zero between the truck beds. You do need to build a spacer (usually 18") so the camper has something to push against to prevent contact with the tail lights.


2015 Ram 3500 4x4 Crew Cab SRW 6.4 Hemi LB 3.73 (12.4 hand calc avg mpg after 92,000 miles with camper)
2004 Lance 815 (prev: 2004 FW 35'; 1994 TT 30'; Tents)


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