Your BMX Bike All Grown UpLowside is like the grownup version of the bike you rode when you were a kid and still had hopes and dreams and some semblance of ambition. Itâs just as happy riding singletrack as it is parked outside your favorite drinking establishment.Lowside is a single speed mountain bike. Singlespeeding has been a part of Surlyâs DNA since day one when we launched the 1x1 Rat Ride. After a lot of Homie Fall Fests and more feats of strength than we can recall, we decided to discontinue it a couple years back. Lowside picks up right where the 1x1 left off."Some have dubbed the Lowside the ultimate pub cruiser."