I've seen some full-bamboo road bikes, but this is the first track/fixed-gear. Interesting dual downtube. The guy says that he "would not recommend racing sprinting or hard climbing on the bike" and it's "very flexable."

For sale on ebay





Does anyone know what spoke pattern that is?

ALSO: I'm more interested in the discussion about this bike than the fact that it is on ebay, which is why I made it its own thread.

hmm. definitely an interesting (and decent looking) build... sounds a bit iffy for anything but hanging though. I wish there was a better close-up of the track ends & the BB juncture of the frame. Either way, certainly interesting looking. And here's a link the the 3/3 wheel building.

There's no link.

haha. wow. sometimes I suck at the internets. I think doing tech support during the week fries my brain for the weekends.

i added the link to my original post.

This pattern I`we seen called "crowfoot". I made several, think they are wery nice looking and actually easyer to make than the ordinary setup. A bit more tricky to tune. I`we got another one ewen better looking but a bit more risky, think it is more for the look. I`ll try to remember to post it tomorrow.

I just looove bamboo, in all type of use and form. Got to love it when I made kites. There are some real nice bamboo bikes on the net, some with thicker "tubing".

Crow's foot is different. The front wheel in the OP is Three Leading Three Trailing.

^That's not crow's foot. Crow's foot is 2x plus radial. ^

It looks like it's lashed together with twine or something. Maybe if he used a different lug it would be stiffer. Is this like survivor man's bike? I just see him now... If you have to get somewhere in a hurry and all I'm left with is some bike parts look I can lash together this bike with some string from my parachute and some bamboo. wtf.

pssh, sloping top tube, soooooooo lame.

I'd like to see a Calfee bamboo track bike. Someday when I finally get a grip of cash, I'll splurge on something like that.

we have one at my shop. it's a lovely bike, and really lightweight as well. definitely something i'd like to have someday. also, way nicer than that pos one at the beginning of the thread.

Looks like they tried to use the same hand wrapped bamboo fiber that Calfee uses, only with a lesser quality out come.

"Well here I am in the middle of the wilderness, thousands of miles from any potable water or food, yet I have some luxurious top-shelf track components, but no steel or aluminum tubing. Ah, I know...BAMBOO!"

The bike on ebay is a piece of c*&p. The only reason I'd buy that would be for the components. A group of me and my friends recently built this bamboo track frame for our engineering design class at Princeton. It is similar to calfee but not nearly as over built. Our frame is only 3lbs (a full pound less than one of calfee's frames) and is as strong and stiff as any frame out there. The total bike weighs only 14.7 pounds. Plus it only cost us 100 bucks to build the frame . . a far cry from calfee's $3000 price tag for a custom frame. We've already put about 100 miles on it during test rides can easily perform any fixie trick. We used unidirectional carbon fiber tape and resin to wrap the joints. We designed the beefy dropouts in proEngineer and machined them with a 3-axis cnc machine. The pic is of the bike in its rough stages before sanding and clear coating and still has an uncut steering tube . . . Riding this frame is smoooth and unlike anything you've ever ridden because of bamboo's vibrational damping. It's a blast. What yall think?

I'm very impressed. Very interesting approach to the joints...you literally just wrapped them with carbon tape? How does that work?

We dipped individual strands of carbon fiber in resin and then wrapped each joint one strand at a time. It makes for an extremely strong joint. check out our other post on velospace.org. . . . https://velospace.org/node/7419

I like it.

why left side drive?

why not. . . we thought we'd try it out