most technologically sophisticated bike

[krebs303]

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.

 

[Bala Verde]

How easy is it to switch out a wheel?

I see an advantage for Schleck; no more chain drops...

 

[Rip:30]

hmm. still looks like two triangles plus two wheels to me.

 

[krebs303]

It has some sort of drop outs. doesn't look fast.

 

[RDV4ROUBAIX]

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.

 

[STODRR]

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.

killjoy.

 

[DirtyWorks]

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?