Question about building a cargo trailer. - BMW Luxury Touring Community
 
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post #1 of 9 Old Mar 12th, 2009, 9:16 am Thread Starter
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Question about building a cargo trailer.

I'm going to build a trailer. My preference is to use a kit with 12" wheels but have no reason other than " bigger is better".

Is there any real reason to go with either an 8" or 12" wheel?

I'm looking at a Harbor Freight kit with the 12" wheels, or Northern Tool with 8".

Joe Van Orsdol
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post #2 of 9 Old Mar 12th, 2009, 9:49 am
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Re: Question about building a cargo trailer.

Quote:
Originally Posted by joevano
I'm going to build a trailer. My preference is to use a kit with 12" wheels but have no reason other than " bigger is better".

Is there any real reason to go with either an 8" or 12" wheel?

I'm looking at a Harbor Freight kit with the 12" wheels, or Northern Tool with 8".
I have had several trailers with different configurations and I have not noticed any signifigant differences that were not related to trailer weight or single vs dual wheel configuration. Lessons from my experience would be LIGHTER IS BETTER, and NOTHING IS BETTER THAN THE SINGLE WHEEL CONFIGURATION. Not that the others are bad but single wheel is better.


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post #3 of 9 Old Mar 12th, 2009, 10:20 am
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Re: Question about building a cargo trailer.

Quote:
Originally Posted by joevano
I'm going to build a trailer. My preference is to use a kit with 12" wheels but have no reason other than " bigger is better".

Is there any real reason to go with either an 8" or 12" wheel?

I'm looking at a Harbor Freight kit with the 12" wheels, or Northern Tool with 8".
A few thoughts pro and con:

12" wheels will spin slightly slower than 8" - but neither will never even close get to an rpm that will outpace what the bearings are designed for.

12' wheels - due to the profile of the tire - don't have as big a footprint as the 8" - no real issue on a trailer except that the 12" may have slightly less drag, the 8" more grip in a curve.

Load rating on either is WAY above what you'll ever need. I run my 8" tires at 20 psi instead of 60. Not only does this insure full tread contact with the my light total load (#350) it also allows for more sidewall flex and better shock absorption. It also allows the tread to wear evenly.

8" tires allow you to more easily match the ride height of the frame of the HF trailer to the hitch height of the LT - an extremely important component. You usually need to flip the springs on the 12" or incorporate a bend in the neck of the hitch.

8" tires provide a lower center of gravity and less unsprung weight.

8" tires are less expensive.

12" tires somehow "look" better since they are closer in size to your motorcycle wheel circumference, although I prefer the "low slung" look of the 8".

12" tires will ride better over pot holes.

Regarding those bearings you get with either kit - toss them and buy some ISO certified Timken or SKF bearings. The Chinese ones included are absolute garbage - keep them as back ups only. The ISO rated ones will last 100K miles in a heartbeat and worth spending a few extra bucks for peace of mind.

Go here and talk motorcycle trailers until the cows come home:

http://forums.delphiforums.com/MCTrailertowing

or here to look at the one I built:

http://s31.photobucket.com/albums/c3...ler/?start=120

The trailer build pictures start about half way down the page.

Next topic: dino or synthetic grease for those new bearings...


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post #4 of 9 Old Mar 12th, 2009, 3:27 pm
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Re: Question about building a cargo trailer.

Your question immediately reminded me of riding onto a ferry boat while crossing the Tennessee River. The boat had a large rounded (almost curb-like) hump that you had to go over to get on. I don't think it would have been possible on 8" wheels.

Ron


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post #5 of 9 Old Mar 14th, 2009, 1:43 pm
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Re: Question about building a cargo trailer.

I built the same trailer except I covered it with 1/8" aluminum diamond plate. It looked great. I also made an aluminum frame and mounted a small cooler in front of the carrier. I sold it and I don't think I have a pic of it now................I used the 8" wheels and they worked great for me...........

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post #6 of 9 Old Mar 14th, 2009, 3:11 pm
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Re: Question about building a cargo trailer.

I've never had any trouble with small trailer tires towing around town. On long highway trips I have had the least amount of problems with 13" trailer tires or larger on the highway. The smaller tires just don't like long 70 to 80 mph runs.

Most trailers you buy have no shock absorbers & the tires & wheels are not balanced. Just balancing the wheels & tires will reduce a lot of tire failures.

Dave Selvig
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post #7 of 9 Old Mar 23rd, 2009, 7:19 pm
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Exclamation Re: Question about building a cargo trailer.

Hi guys;

You guys in the US are lucky to have a place like Harbor Freight to get trailers cheap to finish building affordable cargo trailers.

I have tried to find something like that group here ( around Montreal, or even Quebec, Ontario) and can't find anything. I found one for sale in Ontario but the guy wanted 650.00 for it!!

I did find a Sear's car roof carrier for 129.00 and a place to get some trailer parts like wheels, light kits and I think I found a new hitch part.

I might look for some 2" square tubing this weekend to get a basic cost of the frame.

Hopefully I should be able to build something ( 40" x 48" ) for around 300.00 Can!!!

Any suggestions from Canadians would be appreciated.

Regards,
Bowdon
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post #8 of 9 Old Mar 23rd, 2009, 9:10 pm
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Re: Question about building a cargo trailer.

Bowdon.. I searched for "bearings" in Ontario and got a bunch of "hits"... I'm guessing there are some up there 'cause I've seen you guys have wheels =) just a matter of finding the source!
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post #9 of 9 Old Mar 24th, 2009, 7:23 am
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Re: Question about building a cargo trailer.

Quote:
Originally Posted by cfell
Bowdon.. I searched for "bearings" in Ontario and got a bunch of "hits"... I'm guessing there are some up there 'cause I've seen you guys have wheels =) just a matter of finding the source!
Cfell;

I have found bearings, light kits, axles, wheels,,,,,,,,,etc....

I priced out 2'x2' square tubing and WOW!!!!

It would cost me around $ 250.00 at least for the parts!!!

I have looked at Harbor Freight trailers ( small one( 42708-4VGA 8" wheels) is $199.00) but there is no HF around!! The closest one to me is Albany NY. I will call to see if they have one, and maybe pick it up next week!!!

Saves time and costs!!!

Regards,
Bowdon
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