Mountain Bike Action
test rider Spencer Rathkamp blazes the downhill during last Thursday's Over the Hump race
in Castaic, California, on the wild, carbon fiber Pinarello DogmaXC
. A skilled dirt-jumper as a kid, Spencer is proving to be a talented cross-country racer, too. Photo: JK/Mountain Bike Action
The DogmaXC's frame uses Pinarello's ultra-unique ONDA XC Twin Arms seat stays and asymmetric chain stays.