New Corbin UniBar (unicycle handlebar)
I made a new handlebar for my geared KH26. I was using the KH T-bar, but it feels really flexy and it feels like the seat will eventually break from the pressure I put on it. I had already made a slightly longer and slightly wider T for it out of CroMo steel, but it was just as light as the aluminum original.
Here’s the new bar, completed and installed:
New bar, 352 grams:
Old bar plus the seat strengthen plate (not needed with my design):
So, 150 gram savings in weight by using CroMoly steel. And it is a lot less flexy!
Building process:
1. Fabricated a lug:
2. Brazed it onto the seat tube attachment:
3. Not shown, brazed on the back tab for the bolt/cincher
4. Cut a T, made a fish mouth in the end, and brazed on the top:
5. Inserted the 22.2 tubing into the “lug” and brazed it together. The lug adds strength; I’ve broken handlebars at that location.
I’ve got the new KH Fusion Zero seat, and I get a lot more handlebar flex with the handle attached to the seat (on a KH36). I’ve been looking for a nice way to attach the handlebar to the seatpost. Your method looks great! When you’re ready to make a few for those who lack machining and brazing skills, name your price!
Thanks for sharing your adventures with strangers.