most technologically sophisticated bike

Mar 16, 2009
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Engineering students spent a year designing this bike

We set out to create a bicycle that would push the boundaries of integrated systems. The result is ALPHA, the first bicycle with a fully internal drivetrain including an electronically-controlled clutch allowing the rider to switch between fixed-gear and freewheeling configurations. All of the bike’s components, including a belt drive, brakes, and an onboard electronics suite, are housed inside the custom-machined frame. Besides protecting these fragile components from degrading environmental exposure, this integration also gives the bike a streamlined, striking appearance.
 
Mar 10, 2009
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How easy is it to switch out a wheel?

I see an advantage for Schleck; no more chain drops...
 
Mar 19, 2009
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The wheel set alone weighs more than most top level race bikes. Sturmey Archer hub laced to 36h H Plus Son Formation Face rims, front drum brakes. Ooof! Heavy! Fun school project though. :cool:
 
Jan 4, 2010
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RDV4ROUBAIX said:
The wheel set alone weighs more than most top level race bikes. Sturmey Archer hub laced to 36h H Plus Son Formation Face rims, front drum brakes. Ooof! Heavy! Fun school project though. :cool:

killjoy:D.
 
The drivetrain is interesting to me. Belt drive according to the clutch diagram, but no belt in the graphics. I thought perhaps he had some sort of shaft design.

The switch off the freewheel mechanism seems to suggest the sturmey-archer hub has been modified. Does Sturmey Archer build their gear system without freewheel pawls?

The clutch is a school project all on its own. I never dreamed fixed gearing would capture the minds and hearts of so many. Never.

Where can one buy the pre-preg carbon used in that project?
 

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