One of the first for sale to the public.

[Moolz]

Its their integrated speed sensor - you just add the magnet to the wheel.

There is also a cadence sensor on the outside on the chain stay.

 

From Trek Website:

DuoTrap seamlessly integrates the computer sensor into the frame to measure speed, distance, and cadence with no added aerodynamic drag. It works with all the major ANT+ wireless technology players, including Bontrager, Garmin, Powertap, and SRM.

 

Now thats cool!

[Marius]

[MTB_Roadie]

Now thats cool!

 

+1

[gummibear]

So what they cost?

 

Complete bike with Di2 and Aeolus 5.0 clincher wheelset R88000