Originally Posted by
Juggler2
I tried this last night. The barend that I tried couldn't support my weight.

Better I found out in my garage rather than on the road. That seatpost could wreck havoc with my undercarriage.

Sorry about your problem and I am truly glad that you tested before depending on it.

I guess all bar ends are not equal. I have been beating the hell out of my adapter and have had no problems. I weigh 210 lbs.
I inspected the bar end I used and found it to be of the same size tubing as a normal seat post (22mm I think but I won't swear to it without measuring it again) and with a excellent weld.
This appears to be a case of "your mileage my vary".
I am currently making another to use in the refurbishing of my Schwinn "grocery getter".