Living Car Free - newly built bike trailer

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View Full Version : newly built bike trailer


cerewa
03-10-06, 08:45 PM
Hey everybody,

I just built a bike trailer... haven't really gotten to test it out except pulling it behind me without a bike, on the way to the laundromat. I think it'll work pretty well for getting groceries and stuff. It's a 45-gallon plastic container on wheels.

The pictures are in our building's basement, which is cramped and messy, so they're not that good.

The "hitch" is completely untested, but I think it'll work out fine. Just a punctured tire tube. I was inspired by the couple of links people posted to "free plans" for bike trailers and the threads about other people's homemade trailers. Oh, and my bike (the one I ride a whole lot and intend to use to pull the trailer) is in the one picture.

I found the pieces of metal that are U-shaped on the side of the road. Bought some 3/4 inch conduit from Home Depot and used a conduit-bender to bend it around the plastic container. I used an electric drill with a metal-grinding bit and a drill bit to make all of the holes for bolts and the wheel axles. I don't have a giant drill bit so the grinder had to do a lot of work for the axles.

I intended to make the trailer ride low to the ground, but not quite as low as it does. Oh well, that means at least it won't be tippy when cornering.

EDIT:

oh yeah, so here's the parts list:
$13 - 45gal sterilite plastic tote
$20 - used 20in-wheeled child bike
$6 - 10ft length of
$3 - one large bolt with nut, several smaller ones
$0 - u-shaped piece of (galvanized steel?) metal found on roadside
$0 - old bike tire tube

tools used: conduit bender (home depot has them for $40), electric drill with bits, hacksaw, cone wrench and two adjustable wrenches, flathead screwdriver, two pairs of pliers.


STEEKER
03-10-06, 09:53 PM
Great job on the trailer , They come in handy.

Nightshade
03-11-06, 10:28 AM
Noticed a couple areas that need work as they are just to weak now.

At the back you need to add a FULL crossmember to avoid twisting of the
single tube frame.

The tube hitch is NOT strong enough for any loading. If you want to use rubber
at least use a section of tire to pickup the strength of the cording used in the side
walls. BIG differnce.


attercoppe
03-11-06, 05:52 PM
Nice job - makes me want to get mine finished. I don't understand your hitch, though - can we get a picture of it attached?

cerewa
03-11-06, 11:01 PM
At the back you need to add a FULL crossmember to avoid twisting of the
single tube frame.

Yeah, I just tested the trailer and something needs to be done to strengthen the tube on the left side of the frame. (The right side tube is fine because it's all the same piece of tube from the back of the trailer up through the hitch.) I was bummed when I found out that one 10ft length of EMT conduit was not going to be long enough to connect all the way around the trailer. Maybe somewhere you can get 15ft pieces of EMT conduit. (?) I'm still hoping I can use some of the stuff I have sitting around to stiffen up the left side of the trailer.


The tube hitch is NOT strong enough for any loading.

I don't have an old tire right now, but the tube thing seems fine to me. I just have to double the tube. Attercoppe, see the pic on this post. I rotated it, so now the top of the picture corresponds to the top of the trailer. The red dot is where the frame-member of the bike's left side goes through. The seat-stay (tube from dropout to seat) is what I wrap the tube around.

Tonight when testing I was lazy and wrapped the tiretube around the seatstay and rather than bolting the doubled-up tube to itself, I tied it in a knot. I might just stick with that system, because it's not looking like bolting everything on (or using a wingnut, which I had planned to buy) will really make things easy and convenient. Tying the tube in a knot is crude but easy.