The rotor got noticed at
CyclingNews
Check out the rotor diameter on this Calfee carbon tandem!
Originally Posted by
swamptandem
Interesting choice for this Tandem. A huge disc brake for high speeds (like downhills) and a max rear cassette size of 28t on a 2x10 set up.
Thankfully, the Di2 RD was given a longer cage, so as to handle the a larger cassette than 28t.
Originally Posted by Cycling News
The standard Shimano Dura-Ace Di2 pulley cage is traded out for a mountain cage to handle a wider gear range, too.