Timothy of San Mateo, California rides his fixed gear Soma Rush bicycle up and down the San Francisco Peninsula when he's not riding the train. Tim's flip-flop hub is fixed on one side, freewheel on the other. He's rigged for fixed in this photo.
Soma is a South San Francisco designer of steel bicycle frames and urban cycling accessories. The Rush is designed specifically for the urban cyclist, with brake mounts and bottle cage braze-ons. Soma Rush frame without fork retails for under $400.