Ultralight Borealis Fat Bike Put Through Hell, Comes Out Shining

I spent 13 long, cold hours on the Yampa last month at the Actif Epica bike race. The extra-wide tires floated through inches of snow, without feeling sluggish. On hard packed snow, I was able to cruise quickly and comfortably. Even with flat pedals and heavy boots, the lightness of this bike made me feel as fast as I do on endurance mountain bike races. —Amy Oberbroeckling

I had the chance to ride the Yampa on singletrack at the Outerbike event in Moab, Utah, and I really enjoyed the performance of the rigid frame and fork on moderate, buffed-out trails. The bike railed around corners and plastered smiles on the faces of several riders who tested a couple configurations of the Yampa. —Sean McCoy