DESC: New from Schwinn for 2007 : The Schwinn Mark II now comes in New Colors. The Schwinn Mark II bicycle trailer is a stable and reliable one or two passenger bike trailer that easily converts to a walking stroller. Built on a light aluminum chassis with 20? wheels, the Mark II is the mid-range bicycle trailer in Shwinn?s lineup. The Mark II bicycle trailer includes all the great features that you?d expect from a Schwinn bike trailer. Outrigger wheel guards that prevent all kinds of mishaps protect the