Join Date: May 2008
Location: Colo Springs, Colorado
Mentioned: 3 Post(s)
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Quoted: 585 Post(s)
I built this one out of an air-tired dolly, which gives you some trailer suspension, from Home Depot, and bolted a large Contico container to it.
I have the means to cut and weld, which I realise many don't, but I had to cut off the brackets that hold the wheels, and weld them back on further up the frame, then cut off the handle, drilled a hole thru the frame and installed an "eye" bolt, which spins, so if the trailer tips over, and it can, as it's somewhat top heavy and narrow, it doesn't take you with it.
The hardest part is fashioning a trailer hitch frame, which I did by bending up some 1/2" conduit with a conduit bender, and welding on an L bracket with a clevis hitch pin that the "eye" bolt drops onto, then a washer, then held together with a clevis "hitch pin", all available at the same hardware store.
My rig is a hardtail, so I wouldn't know how to do this for a bike with rear suspension, but there are ready-made trailers that fasten to the underseat post.
I have a post rack that the batteries sit on, that the hitch frame is fastened to, plus part of the hitch is bolted to the mount holes already in most bike dropouts.
I've been using this rig for three years, as I've gone car-less. It hauls enormous amounts of stuff. I've had it full of ice, drinks, and other party stuff, plus a 120 lb nephew sitting on top for a 2 mile trip, with no trouble, but I do have electric assist, although with a low geared bike, it's still easy to do, just slower.
The Contico container is very tough, and is completely waterproof, even lockable.
I think it's esential to keep the hitch point in the same plane as the wheel axles, or the weight of the trailer will try to pull you over when making turns. My design has no affect on the way the bike handles, except that there's a big lump of weight you have to haul around.
Whole project cost about $90.
Last edited by wernmax; 06-08-08 at 08:28 PM.