Wheel size - Page 2 - Fiberglass RV


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Old 02-01-2014, 12:38 PM   #15
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Name: Russ
Trailer: Scamp 16' side dinette, Airstream Safari 19'
California
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Originally Posted by Francesca Knowles View Post
No need to upsize if additional weight-bearing capacity is the concern. The 13" tires supplied by Scamp are load range "C", but they can be had in LR "D", too. ( Link)
That step up in range achieves an increase in load bearing capacity from 1360 to 1725 lbs.- per tire, of course.

And without changing the trailer's wheels!

One caveat:
This presumes that the trailer wheels in question are rated for the higher (65psi) pressure of the LRD tire. Such info is usually stamped on the wheel itself.
Francesca,
I changed wheel size to 14" to gain weight capacity. At the time I didn't see availability of the tire in your link. I could have saved a lot of money!
Oh well, It was a fun project, and I have new suspension now.
Russ
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Old 02-01-2014, 01:41 PM   #16
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Name: Francesca Knowles
Trailer: '78 Trillium 4500
Jefferson County, Washington State, U.S.A.
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Originally Posted by ruscal View Post
Francesca,
I changed wheel size to 14" to gain weight capacity. At the time I didn't see availability of the tire in your link. I could have saved a lot of money!
Oh well, It was a fun project, and I have new suspension now.
Russ
I'm glad you brought suspension up, Russ. I forgot to point out in my earlier post that in all cases, the lowest capacity component of the system governs carrying capacity. In your case, I presume you have the 3500 pound axle that appears to be standard on the Scamp 16, so you have enough capacity there to reap the benefit of higher-weight bearing tires etc.

But of the two 13 footers the O.P. is considering, that is only true of the Casita 13, which also comes with a 3500 pound axle. Link to specs
(Side note: Strictly in my opinion, that's too much axle for such a small trailer...I suspect it would result in a really harsh ride unless the trailer was loaded close to 3,000 pounds or so.)

The Scamp 13, on the other hand, has a 2200 pound axle. Link to specs That's its limiting weight-carrying factor. Neither upsizing nor increasing LR of tires will result in an actual increase in carrying capacity.

And here's a bit of unsolicited advice to the O.P.:

This is the first time I've ever looked at the specs for these two 13-ers side by side...the Casita being so much heavier (even "dry"), it seems to me that if keepin' things small/light is a primary aim the Scamp would be the better choice.

With the 13" tires!
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