One of the several surprises of Surly Bikes for 2012 is the new mountain bike called Moonlander. While the previous Pugsley bike is known for being a fat bike, the new Moonlander is even fatter. In order to do this, the bike used Clownshoe 100mm wide single wall rims.
Drilled out, the visible rim strip is available in multiple colors. On those 100mm rims rides the new Surly Big Fat Larry tire are around 4.5in wide. With the 28mm offset of the frame and the Mr. Whirly Offset Double (MWOD) crank, there is enough room for a large rubber even without chain rub.
With incredibly large tires and wide rims, the ultra fat 2012 Surly Moonlander Mountain Bike features remarkable floatation, traction, and minimum ground impact. The two fat bike tires are the assertively knobbed 3.8in wide Nate tire and the softer threaded Black Floyd tire that is ideal for paved riding.