Originally Posted by bobotech (Post 13878131)

The only problem is that the OP built a single wheel trailer. It needs 2 attachment points on either side of the bike frame. You want the attachment points rather spread apart so the leverage isn't concentrated which could allow the trailer to twist out of line with the rest of the bike. The OP mentioned that he wanted to attach the trailer to the seat stay. The more I think about it, the worse of an idea that would be for a single wheel locked frame trailer to use a seat stay or seat post as a lock point to keep the trailer lined up with the rest of the bike.

You want to have a rather wide attachment point for the trailer frame. That way it spreads the leverage across a wide point and doesn't concentrate it all at one point. The seat stay is only about 34mm wide. The rear drop outs are about 135-150mm. Best to attach the frame to the drop out area.

If the trailer was a 2 wheel trailer, then you would only need one hitch attachment point since there would not be any appreciable side loading. You could then use the seat post as the attachment or even the seat stay.

Originally Posted by avtandil (Post 13878592)

oh bro..i did not think about it.....u r 100% right....i just called the guy who helps me and asked to stop working.....but regarding that i have some questions
t will that thin thing could handle 10-20 kg? maybe 30 kg.....i was thinking that quick release would brake apart.

Originally Posted by mctrek (Post 13883293)

I have a Burley trailer that I use with my kids. You might want to check out Burley's forged aluminum attachments that the quick release wheel axle/lever goes through. Here is a link to one.
http://www.biketrailershop.com/burle...rts-c-148.html

Then you run a C clip/lock pin 1/4x2 lock pin through it.
http://www.burley.com/home/bur/listitems_200_15?

So your trailer would have to have attachment points with a hole in it for the C clip lock pin to go through. Seeing the link above you might be able to use reinforced hose??

Just trying to help, I don't know if you would have access to Burley parts in Georgia but a machine shop with a CNC could make you something similar in no time.

Originally Posted by avtandil (Post 13882832)

hello?
is anybody here? plzzzz

Originally Posted by p2templin (Post 13883435)

Dude, take a chill pill. If you want professional help in a timely manner, go to your LBS and pay them. Around here, we're free help, in case you hadn't noticed.

Originally Posted by a77impala (Post 13887253)

My home made single wheel trailer. Connects in under 30 seconds.http://bikeforums.net/attachment.php...hmentid=238547http://bikeforums.net/attachment.php...hmentid=238548

Originally Posted by avtandil (Post 13887438)

nice bro.....how u attach it? u use quick release?

Originally Posted by a77impala (Post 13887560)

The trailer frame drop outs rest on shoulder bolts attached to flat steel brackets
fastened to bike drop outs by the quick release and fender mounts. The trailer is prevented from detaching by stops that fall under the shoulder bolts and are locked in place by tightening Allen screws.
The Allen wrench hanging from trailer frame is left there for quick access.

Originally Posted by fietsbob (Post 13888458)

steel shaft skewers are fine.. gilding a turd is silly..

Originally Posted by Glynis27 (Post 13888634)

Try this link. It has lots of good info and a few different hitch designs with pros and cons of each.

http://www.bikeforums.net/showthread...-Trailer-Hitch