larger tires on a Scamp - Page 2 - Fiberglass RV


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Old 06-21-2016, 08:54 AM   #15
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Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
Posts: 1,045
I installed a flexiride axle so I could adjust the ride height for the hitch on my VW and tire clearance for the 14" tires.
When I rebuilt the front A frame I didn't add a step up or down.
The trailer rides level with plenty of clearance for the new tires now.


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Old 06-21-2016, 08:55 AM   #16
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Name: Gordon
Trailer: 2015 Scamp (16 Std Layout 4) with '15 Toyota Sienna LE Tug
North Carolina
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My Scamp 16 came with Greenball Transmaster TT13175C tires rated at 1360 lbs.

I am currently at 1150 lbs on each side, plus 225 on tongue (total trailer weight 2525).

When I replace these tires in about two years, I would like a larger safety margin in tire weight rating. I don’t know if 14 inch wheels and tires would be ok or not. The clearance between the top of my current tires tire and wheel well (while the trailer is at rest) is:
Port = 4 1/4 inches; Starboard = 3 3/4 inches
As the axle ages and taking into account the up and down movement, how can one tell how big is too big (or how much clearance you need)? I expect I will stay with 13 inch wheel and just buy better tires. I will not be buying Greeball tires but taking their product specs as an example, I see the load ranges per tire size are:
13 inch: 1360 - 1480
14 inch: 1760 - 1870
15 inch: 1820 - 2830
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Old 06-21-2016, 10:18 AM   #17
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Name: Norm and Ginny
Trailer: Scamp 16
Florida
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I believe my tires are rated for 1480. The trailer has about 2400 lb on the axle leaving about 280 lbs of margin/ tire Since the tire patches are equal on each side I've say at least in a static condition the load is equal side to side.

We minimize tire stress by avoiding high speeds, long drives and high temperatures.

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Old 06-21-2016, 11:25 AM   #18
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Name: Keith
Trailer: Scamp
Texas
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When I look at the spec sheet for the Dexter #10 torflex (http://dexteraxle.com/i/u/6149609/f/...nformation.pdf) it looks like there is a wide range of angle options. People have recommended the 10 degree down so that I can fit the Orbital Shock kit and a three inch lift kit. But, it looks like you can get 3" more clearance by going with the 45 degree down option with no lift kit.

I'm just wondering if it is worth while to get the less severe angle and the shock kit and the lift kit, or if I should just make it simpler and get the 45 degree down axle, which would also give me more center clearance. Does the shock kit make a huge difference?

Also, I will certainly not be welding the axle to the frame the way Scamp does. I will have the dexter brackets welded on so the axle is a bolt on job in the future.
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Old 06-21-2016, 12:43 PM   #19
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Name: Gordon
Trailer: 2015 Scamp (16 Std Layout 4) with '15 Toyota Sienna LE Tug
North Carolina
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Originally Posted by Keith2000 View Post
...
Also, I will certainly not be welding the axle to the frame the way Scamp does.
You mean did. They now use brackets so that the axle bolts on.
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Old 06-21-2016, 01:38 PM   #20
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Name: Keith
Trailer: Scamp
Texas
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You mean did. They now use brackets so that the axle bolts on.
That is good to hear. I thought they were immune to improvements.
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Old 06-21-2016, 02:56 PM   #21
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Name: Jon
Trailer: 2008 Scamp 13 S1
Arizona
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That is good to hear. I thought they were immune to improvements.
Jalousie windows, big bed option in the 13'er, new cabinet finish and hardware, new screen door, powered vent fan replacing tip-out window in bath models, bolt-on axle… and that's just in the last few years. Whether all the changes are for the better is debatable, but it's certain they're happening!

The basic shape and concept remain the same, but details evolve, kind of like the old VW Beetles.
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Old 06-21-2016, 03:12 PM   #22
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Name: Darral
Trailer: Scamp Standard 13' 2010
Tennessee
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I can agree with the bed option...maybe the screen door (we like our bi-fold screen door)...but WHY the bathroom window???? We have the tip out window and I would NOT want to be without it! It provides light and good venting when I have the Scamp upon the jackstands. If people complained to have it removed- I'm serious- I'd like to know why?

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Originally Posted by Jon in AZ View Post
Jalousie windows, big bed option in the 13'er, new cabinet finish and hardware, new screen door, powered vent fan replacing tip-out window in bath models, bolt-on axle… and that's just in the last few years. Whether all the changes are for the better is debatable, but it's certain they're happening!

The basic shape and concept remain the same, but details change, kind of like the old VW Beetles.
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Old 06-21-2016, 03:59 PM   #23
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Trailer: 2015 Scamp (16 Std Layout 4) with '15 Toyota Sienna LE Tug
North Carolina
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Originally Posted by Darral T. View Post
...but WHY the bathroom window???? We have the tip out window and I would NOT want to be without it! It provides light and good venting when I have the Scamp upon the jackstands. If people complained to have it removed- I'm serious- I'd like to know why?
I understood that is was because the bathroom window was prone to leak. I can't confirm that however. What I can confirm is that the VanAir powered roof vent they used in my side bath (instead of a window) did leak. It requires quite a bit of sealant since the roof is not flat, and in my case they left a small gap.

I thought i had it fixed but I think it is leaking again. At least the rain water goes onto the commode and shower floor and should not be a problem except for the fan it's self. If the fan gets damaged from the leak, I will just seal it up.. I dont need the vent.
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Old 06-22-2016, 03:48 PM   #24
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Name: Keith
Trailer: Scamp
Texas
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So, has anyone other than Donna switched to a 45 degree down angle to fit in bigger tires?

Is that a common approach to the issue?

Are there downsides? Harsher ride, etc?
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Old 07-04-2016, 02:17 PM   #25
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Name: Joel
Trailer: Currently Shopping
Arizona
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Jeep 18" wheels and stock tires... maybe


Greetings from Tucson and a Tin Horn Scamp 13 Wannabe. I'm looking for a very used Scamp 13 in need of a total rebuild. I have the shop space and skills to handle all aspects - I just don't have the experience to gauge the outcome. I have a 2011 Jeep JKU 4-dr Sahara and would like to have my rebuild on a Scamp 13 include modifications to house an axel with the Jeep 5 X 5 lug pattern and house the same 18" stock rims and Cooper tires. I know it will require chassis and body mods (and maybe fender flares), but if I can do it all is there any reason it won't work on the road? Thanks to all who may comment.
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Old 07-04-2016, 02:50 PM   #26
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Name: Jon
Trailer: 2008 Scamp 13 S1
Arizona
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Originally Posted by Cowboy Joel 69 View Post
Greetings from Tucson and a Tin Horn Scamp 13 Wannabe. I'm looking for a very used Scamp 13 in need of a total rebuild. I have the shop space and skills to handle all aspects - I just don't have the experience to gauge the outcome. I have a 2011 Jeep JKU 4-dr Sahara and would like to have my rebuild on a Scamp 13 include modifications to house an axel with the Jeep 5 X 5 lug pattern and house the same 18" stock rims and Cooper tires. I know it will require chassis and body mods (and maybe fender flares), but if I can do it all is there any reason it won't work on the road? Thanks to all who may comment.
That sounds like a pretty ambitious project. There was a Scamp 19 (gooseneck) for sale a while back in Utah that was completely redone for heavy-duty off-road use, including a raised chassis riding on an independent suspension. Not sure where it was sourced, but one option is a Timbren independent suspension.

Here's a link to an article: Off-Road Scamp 19 Project. It's a bit over-the-top, but it might get your creative juices flowing!

Beyond frame and suspension, a weakness you may want to address in your rebuild is the riveted attachment of interior components to the shell. I can see aluminum rivets failing and cracks forming in the fiberglass around the holes during serious off-road use. The owner of the Utah project completely redid the interior, and IIRC components were expoxied to the shell rather than riveted.
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Old 07-04-2016, 03:45 PM   #27
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Name: Joel
Trailer: Currently Shopping
Arizona
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Larger Tires on Scamp

Jon in AZ - Thanks for the quick reply and valuable comments. I'll read about the Scamp 19 rebuild and see about all that would apply to a major Scamp 13 rebuild. I can understand the comment on attachment if interior elements using rivets. The Gobi HD roof rack on my Jeep JK is mounted directly to the frame at the rear and to the metal front window mounts directly connected to the metal chassis. Other mfgs have tried mounting to the fiberglass top and failed miserably when the slightest roof load is taken of the smoothest freeway. Also, my Kevlar canoe "glassed" in wood mounting points for the seat(s) supports and cross pieces. Conformation of the idea one does NOT drill through and mount directly to fiberglass (or Kevlar).

Yes, this will be a major undertaking for the rebuild, but I'm retired now and have nothing but time, space, friends and multi-faceted construction experience. I use to say, "Too much fun, not enough time!" - now (retired) I have the time :-)

Cowboy Joel 69
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Old 07-04-2016, 04:10 PM   #28
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Name: Russ
Trailer: Scamp 16' side dinette, Airstream Safari 19'
California
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Joel,
Sounds like a fun project. We've got to keep ourselves occupied! Regarding your wheel swap, the tire diameter will be going up about 10" if you are going to match the Jeep. That means wheel wells and houses may have to go up around 5". You will have to check for water heater and refer clearances inside. If you intend to do hard core trails while towing you may need a pintle hook coupler too. I hope you do a build thread so we can follow your work.
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