The Cruiser Seven is a recent . I assume it has a Nexus 7spd hub. Your bike is probably only a 3-7 years old. Does it have blade forks like the older Schwinns?
Someone already took of all the gear parts, and turned it into a coasterbrake.
It was a cheap set of wheels, so i swopped them with a pair of Electra's. (Wheels, tyers and the cranck part.)