Talked to the guy - it is 5 on 5.5 bolt pattern. Said he had $1,200 into materials so that is likely his low number.

http://denver.craigslist.org/for/2893215692.html

Off road utility or dirtbike trailer - $1750 (Denver)

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Date: 2012-03-15, 3:40PM MDT
Reply to: sdxjs-2893215692@sale.craigslist.org [Errors when replying to ads?]
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I need to sell my custom built high clearance trailer. It is all steel construction and has a 3,500lb rated leaf sprung axle. It is the ultimate camping and hunting trailer or could be used for hauling a bunch of junk around. It also has LED tail and side marker lights. The tires are Super Swampers and measure 33" tall. The box is 6'Lx3'8"Wx2'H.

Thanks.

That is pretty cool. Has some good tongue length, maybe a bit too long. I don't like the pintle hitch and why would you put swampers on a trailer? They look cool, but are hard to balance and noisy. Not to mention add significant weight. Seems narrow too. Why not go the full 48" wide? But I could put it to good use. Wonder what it weighs?