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Valid Premise

A race geometry road frame made from Black and Tonkin bamboo. Lugs made from aircraft grade fiber glass and T-700 carbon fiber.

Frame:
Black and Tonkin bamboo

Crankset/Bottom Bracket:
Sram Apex

Drivetrain/Cog/Chainring/Chain:
M959 Dura-Ace

Derailleurs/Shifters:
M959 Dura-Ace

Handlebars/Stem:
Icon Sterling

Brakes:
M959 Dura-Ace

Front Wheel/Hub/Tire:
Rolf Vector Comp

Rear Wheel/Hub/Tire:
Rolf Vector Comp

Accessories:
Stainless King Cage

Added by Validcycles. Last updated almost 11 years ago.

4 Comments

max5480

max5480 says:

without doubt the coolest bamboo i've ever seen. that triple top tube is sick and the lugs are smooth. how stiff is it?

Posted about 11 years ago

Validcycles

Validcycles says:

Thanks for the comment man! We're pretty proud of it. Stiffness is decent and ridable, but if you are my size (6'1" 200lb) you might find it a bit too flexy for your taste; its not nearly as stiff as all of our single-top tube bikes, which ride as well as anything out there. Plus, black bamboo is not as stiff to begin with as the Moso bamboo we usually do. We also do a triple bamboo top tube that uses extruded carbon fiber rod truss frame (hat-tip to Barno Meres' all carbon rod see-thru truss bike) to stiffen it. That one is way cool, takes forever to build though... I need to post picts of our other bikes. Thanks for looking man, if you are in Seattle, come hang out at the pub with us sometime!

Posted about 11 years ago

max5480

max5480 says:

Awesome, I sure will.
What are the frame weights like for some of your bikes?

Posted about 11 years ago

Validcycles

Validcycles says:

We just finished a cyclocross frame for a customer last month (54cm) that came it at 4lb flat. 4 to 4.5 pounds using lightweight steel or AL dropouts and lightweight steel or Ti BB is pretty typical. Our goal is to keep each frame under 5; which we have always done with the exception of a tandem frame we made a while back for someone, but that is understandable, it was a tandem :)

Posted about 11 years ago