larger tires on a Scamp - Fiberglass RV


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Old 06-13-2016, 01:21 PM   #1
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Name: jerry
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larger tires on a Scamp

Has any one tried putting 14 or 15" tires and wheels on a scamp? I think it would improve rolling and towing, and better tracking and control,
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Old 06-13-2016, 02:16 PM   #2
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I couldn't tell from your profile which Scamp model you own. If it's a 13'er, you can't fit larger wheels without raising the suspension, and that means a new axle. The clearance on the door side is really close.

With the 16'ers, which already have more clearance, I think it might be possible, but I'm not sure if any modifications are needed. It makes more sense with the 16'ers because I believe it allows you to move to a tire with a high load rating.
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Old 06-13-2016, 02:22 PM   #3
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Originally Posted by oldstation View Post
Has any one tried putting 14 or 15" tires and wheels on a scamp? I think it would improve rolling and towing, and better tracking and control,
The primary benefit of larger wheels would be the availability of tires with a greater weight capacity when needed.
The Scamp19 comes with 14" wheels and they are available on the Scamp16.(maybe standard now?)
They are certainly not needed on a Scamp13.

Choosing radials will improve roll resistance over bias tires.
Choosing wider tires will denigrate roll resistance but generally add nothing significant to trailer towing or handling.
Choosing larger wheels will reduce the number of REVs per mile when combined with the same profile, but the added tread life is not significant, especially since trailer tires are seldom worn to minimum tread depth before being replaced anyway.
Another point is that you should check to see if the larger tire and wheel combo will fit on the spare tire mount before deciding on which increased size.
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Old 06-13-2016, 05:11 PM   #4
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Probably a lot of $

New axle, welded on axle lifts, new wheels, tires, step up box to the entry, one of a kind look on a 13. Not sure about that.
If it's an old camper you don't have much $ in and has a bad axle, hubs, tires and you're bringing it into this era, you'll determine if it's worth another $500 materials and labor. Or, consider that expense a down payment on a new one with good stuff (like brakes and load C ST tires) from the factory and sell it as is. We've all chased a project with money and time.
If you're talking about a contemporary 16' then that's another story; you can actually load that baby up front and back and make use of that upgrade.
Have fun and safe travels!
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Old 06-14-2016, 10:26 AM   #5
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Our 16 required a slightly shorter axle for 14" wheel change. The body wheel opening was close on one side. I ordered a Flexiride axle the correct length to clear the fenders.
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Old 06-20-2016, 07:18 PM   #6
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14" Tires for Scamp

Since I have a Scamp 16' on order and I saw the note here of possibly getting 14" wheels, I checked with the Scamp factory. They do not currently offer 14" wheels for the 16' because of "limited space" in the wheel well, and they don't see any future offering either. I guess we'll just have to keep fabricating our own mods!
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Old 06-20-2016, 08:35 PM   #7
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My Scamp has ST205/75 R15 tires and appropriate wheels! I did that by getting a new axle with a 45 degree down angle. Tows just fine behind my Ford F-150.
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Old 06-20-2016, 09:33 PM   #8
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My Scamp has ST205/75 R15 tires and appropriate wheels! I did that by getting a new axle with a 45 degree down angle. Tows just fine behind my Ford F-150.

That was something I noticed in researching a new axle for my 19: you could get a few inches lift just by going a bit more severe on the axle angle.

What are the tradeoffs for doing this versus a standard lift kit?

Assuming a whole new axle, of course.
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Old 06-20-2016, 09:56 PM   #9
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Originally Posted by Rod D View Post
Since I have a Scamp 16' on order and I saw the note here of possibly getting 14" wheels, I checked with the Scamp factory. They do not currently offer 14" wheels for the 16' because of "limited space" in the wheel well, and they don't see any future offering either. I guess we'll just have to keep fabricating our own mods!
Incredible!
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Old 06-20-2016, 10:03 PM   #10
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Typical Scamp- still behind times. Personally, I would not tow a 16' or larger with 13" wheels unless the camper weighed under 1800 lbs.

Quote:
Originally Posted by Rod D View Post
Since I have a Scamp 16' on order and I saw the note here of possibly getting 14" wheels, I checked with the Scamp factory. They do not currently offer 14" wheels for the 16' because of "limited space" in the wheel well, and they don't see any future offering either. I guess we'll just have to keep fabricating our own mods!
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Old 06-21-2016, 12:01 AM   #11
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Originally Posted by Darral T. View Post
Typical Scamp- still behind times. Personally, I would not tow a 16' or larger with 13" wheels unless the camper weighed under 1800 lbs.
Darral;
So you need more than a 1200 pound margin on the load rating on an1801pound trailer?
BTW, Rod D;
I would ask again about the availability of 14" wheels on a 16Scamp, and make sure you ask someone different.

Comparing a 175/80R13 and a 205/75R14 ... there is only a one inch difference in radius and only a one inch difference in section width.
There is far more than that difference between a 13 Scamp and a 16Scamp.
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Old 06-21-2016, 05:38 AM   #12
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14" Tires

At the first Scamp Camp before we had ours, I questioned people about tire size. A number of people had installed 14 inch tires without any real modification to their Scamps. It was on my list to do but did not do. The 13s have worked fine.
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Old 06-21-2016, 06:53 AM   #13
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Quote:
Originally Posted by Keith2000 View Post
That was something I noticed in researching a new axle for my 19: you could get a few inches lift just by going a bit more severe on the axle angle.

What are the tradeoffs for doing this versus a standard lift kit?

Assuming a whole new axle, of course.
Sorry Keith, I have nothing to compare it to other than the old axle (22 degree down) and 13" tires. All I can say, is I'm pleased.
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Old 06-21-2016, 08:33 AM   #14
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A standard lift kit only raises the body of the trailer. The axle tube remains exactly the same. For most purposes that is all you need, since tongue strikes and tail scrapes are the most common clearance-related issues. Older Scamps may have a welded-on axle, so adding a lift kit means you have to cut off the old axle. That typically destroys it, so you're looking at a new axle anyway.

Swapping for a new axle with greater drop angle and installing larger wheels and tires gets the axle tube higher off the ground. If you anticipate extensive backcountry travel, 2-tracks with a hump in the middle, that kind of thing, it makes sense.

Don't know what the maximum available load rating for a 13" tire is, but the ones on my Scamp 13 are only rated for 1360 pounds. Double that, 2720 pounds, doesn't leave much margin on a fully loaded Scamp 16, and some versions are known for left-right imbalance. I think upgrading the wheels to 14" or 15" and increasing the load rating of the tires makes sense in that situation. 14" and 15" tires are easier to find, too.

When the time comes, I will replace the stock 22.5 degree up-angle on my 13' Scamp with a 0 degree axle to get the tail and tongue a bit higher, but I'll likely stick with 13" wheels.

Raising the trailer carries some negatives- more wind resistance and higher step-up, as well as the cost of a new axle, wheels, and tires- that you have to weigh against the benefits.
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