Power2max made quick mention of a power meter for track bikes at Interbike last year, and now it’s finally coming in late May. It uses a different spider specifically for 144mm spacing to maintain the proper chainline and is just for fixed gear bikes.
There are a few other differences, too. First is a lack of the auto-zero function of their standard power meters, so you’ll need to zero calibrate it before you start your session or anytime you change chainrings. Second, the battery was moved inboard and the whole thing made slimmer to work with aero chainrings. The latter was incorporated into the new Type S road power meters, too, which saved 70-90 grams over the still available Classic version. An external LED light tells you when it’s time to charge the battery.
Four models will be offered: Rotor 3D without cranks, Rotor 3D with cranks, 3D+with cranks and 3D30 without cranks. Retail is $1,079 to $1,449, and they’ll be available in very limited quantities at first.