Outside Magazine has named the Rocker SS from Spot Brand as the singlespeed mountain bike of the year in its 2011 Summer Buyer’s Guide. Outside called it “the smoothest, most reliable singlespeed available.” The Rocker features the Wayne Lumpkin-designed Gates Carbon Drive CenterTrack system. The magazine heaped praise on this nimble 29er and it’s clean, quiet, light and strong belt drive:

“Single speeding is about simplicity, and belt drives–which replace the chain and chainrings with a clean, quiet belt-and-pulley system–are austerity incarnate. Testers loved how the Rocker SS’s new CenterTrack belt, with a center channel and shaped fin design, locked the belt on its track for uninterrupted power transfer. The new system, combined with the steel frame’s fluid feel, provided a ride that one tester called ‘beautifully, eerily silent.’ “Our favorite single-speed this year,” adds Outside, “plenty stiff for railing hard but comfier than most hard tails.” Check out the review on page 96 of the digital issue of the Outside Buyer’s Guide. Learn more about this bike and it’s drive train by watching the video about the Rocker SS filmed at the Sea Otter Classic by And check out the Rocker and other belt drive beauties from Spot here.