I have a Schwinn bike frame with serial number of 3007813 and it is located under the crank housing. What year would it have been made?
To find the year when the bike was made, go to http://www.schwinnbikes.com/contacts and contact their support or customer service. You need to give them the model of the bike and the serial number to make the search easier.
Guessing by the number, I guess 2007