Outer Edge Tire Wear - Fiberglass RV


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Old 10-05-2013, 08:41 PM   #1
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Trailer: 1987 Scamp 16ft, Layout 4
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Outer Edge Tire Wear



1987 16ft Scamp, Al-ko axle stamped Type F2587 with a 2400lb capacity


Drove from MN to CO (and back again) - on the way there we noticed that our Scamp was wearing the outer edge of one of our tires was wearing down. I adjusted the tire pressure several times to see if it was a factor, with no results.

I suspect that there is some sort of perpendicular alignment issue with the wheel, but am going to be trying a few things.

First off, checked on the bearings (no excessive heat during travel that I caught). The bearings were stuffed with newish blue grease and there were no signs of water in the bearings. However, when I went to remove the hub I noticed it was just a bit loose- as in, the wheel hub nut could have concievably been tighter by 1 castle nut slot without overtightening the bearings. I'm not sure the miniscule amount of play could have caused the wear on such the outer edge of the wheel- but if anyone with more experience has thoughts on this, please let me know.

I was to check the spindle and see if it's been bent(?!), but 1) I can't come up with a good way to check this without disassembling the brakes 2) if it is bent, I'm fairly certain that dooms me to replacing the axle a few years before I wanted to. A 2400lb axle on a 16ft scamp seems a bit light to me, but we didn't have any gear in the scamp except a file box of food and a box of pans/dishes. All the ice chests, etc, were in the back of our TV. Should I try to get my trailer into a shop that can actually check the camber, even though- this isn't something that is adjustble on a torsion axle? Any other suggestions?
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Old 10-05-2013, 10:34 PM   #2
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I replaced the axle on my 1988 Scamp for this VERY reason. Nothing wrong with the bearings, nothing wrong with balance of the tires, nothing wrong with tire pressure, etc. Between reading the forums here and assistance from a friend, we decided the axle was flat worn out. Replaced it... now I'm Golden. YMMV
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Old 10-08-2013, 07:49 PM   #3
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Thank you Donna!


I Called scamp today and got a ballpark quote for replacing the axle, since they're only 3 hours from us.
$455 for the axle
About 2 hours of shop time at $70/hour

I saw on their online parts store that the newer 3500lb axles come with 5x4.5 hubs, so our wheels won't fit but one of the tires is obviously toast... So I'm not too torn up about needing new wheels and tires.

That said, if I can find a shop in the twin cities that would install a new axle, I could order a 25deg rubber torsion axle from alko... Has anyone else ordered direct, and what did it end up costing you in parts/freight/labor?
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Old 10-08-2013, 08:09 PM   #4
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Drew I think as Donna suggests you are indeed looking at a new axle - a bad axle can burn out tires fast - my neighbour managed to go through 3 sets of tires on his old trillium in a year and half (3 LONG trips) until he changed the axle. Not to mention the low axle rating on your original. I dont think you can go wrong with having Scamp change it out for you.
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Old 10-08-2013, 08:11 PM   #5
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I took my trailer to Trillium / Outback in Calgary. It cost me $1000, and they didn't even kiss me.
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Old 10-08-2013, 08:43 PM   #6
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I can't answer for you Drew, I can only answer for myself. The original Alko axle on my trailer was of marginal weight. I THINK it was only rated for 2200#. I went with a 3500# axle with a 45 degree down. In hindsite, I should have chosen a 3500# axle with a 22 down and a lift bolt on bracket. It would have accomplished the same thing (I wanted 15" tires). I'm certainly not unhappy with what I have. It tows really, really well.

I wish you luck!
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Old 10-08-2013, 09:03 PM   #7
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(There's always the added bonus of getting to check out scamp's factory and models if we go up there)

Mostly just making sure that scamp wasn't employing pricing like a car dealership... cRaZy expensive. I'm generally a DIY kind of guy for cars, campers, and home improvement. It's a rare occurrence to let someone else do the work on one of my favorite things. I think $1000 is a great investment in our egg.

I'm certainly looking forward to the towing improvement... I could use some less jolting of the Ranger. If only you could have seen my O.o face when I read the 2400lb rating.
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Old 10-08-2013, 09:25 PM   #8
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Drew I think you will find the Scamps pricing is pretty reasonable (at least by Canadian standards) on all their products. I know if I could get there I would stock up on a lot of items. In the case of the axle you have the added bonus of getting people who have done one or two before on your trailer and will mostly likely get it right & do it fairly quickly.
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Old 09-29-2014, 09:11 AM   #9
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I wanted to circle back on this thread- I took the advice of the wise folks here and went up to Scamp earlier in the year with my trailer for a replacement axle. (3500lbs, 22deg down, no lift brackets)

I'm extremely happy with the new axle and subsequent wheels. Between the next axle and new tires on my TV (Ford Ranger), it's like pulling a completely different trailer this year. I would be much more confident driving this TV+egg across the windy plains again.

Thank you all very much for the guidance!
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Old 09-29-2014, 09:42 AM   #10
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Glad to hear things worked out. That was a no-brainer to let Scamp do it for that price and if you are close. I ordered the axle and did it myself and have more than that in it due to shipping cost of the heavy axle. The new (larger) brakes and new tires & rims are a plus too. I should be good for at least another 26 years (well, at least after I replace a few dozen rivets & caps).
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Old 09-29-2014, 11:34 AM   #11
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Wear to the outside edge of a tire is not the result of normal axle wear.
Normal wear on the axle would result in inside wear on the tire since that axle normally wears toward negative camber and tow out.
A bent axle or damaged rubber caused by a glancing impact with a curb can cause this problem resulting in positive camber or tow in.
Being towed forward and or impacting the tire against the curb at the bottom is most likely and could cause that type of damage.
This would of course only affect the side which suffered the impact (usually, but not always, the curbside).
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Old 09-29-2014, 01:55 PM   #12
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Quote:
Originally Posted by DrewSK View Post
(There's always the added bonus of getting to check out scamp's factory and models if we go up there)

Mostly just making sure that scamp wasn't employing pricing like a car dealership... cRaZy expensive. I'm generally a DIY kind of guy for cars, campers, and home improvement. It's a rare occurrence to let someone else do the work on one of my favorite things. I think $1000 is a great investment in our egg.

I'm certainly looking forward to the towing improvement... I could use some less jolting of the Ranger. If only you could have seen my O.o face when I read the 2400lb rating.
Glad to hear it worked out for you Drew.
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Old 10-03-2014, 06:08 AM   #13
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Hey there Drew.. I guess with new wheels, tires, and axles we are still not sure what the original fault was but glad the problem is resolved and the rig is towing fine.

I had some bad experiences with lousy alignments from the auto shops so decided to do my own checks. I made up a tool using a level and laser. It is not an exact science but quite accurate. It is also a great tool to center the vehicle's steering wheel (simple tie rod end adjustments).

Although I made it for my cars it could be used to check trailer wheel alignment to give one an idea whether it is out or in spec.
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IMG_4532 lazer.jpg  
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Old 10-31-2014, 04:33 AM   #14
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Hi MC1 Great tool! Is that a laser level with the ends cut and glued to level face? How does it work? Do you measure width of wheels then add twice width of level to check for toe in or out against a projector screen like a wall?
Hmmmm....please do tell!
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