Where can I find a replacement for a rear sprocket for a Schwinn mountain bike that's about 8 yrs.old ?

Question

The bike is a Schwinn Frontier. When I try to pedal it the rear wheel doesn't even move.

Answer 1

most sprockets would fit it depending on how many gears there are

Answer 2

Pretty common part called a cassette. Check with the local bike shop, just take the rear wheel.  It takes a special tool to remove it.

Answer 3

I'm pretty sure any bike shop would carry a part that would fit, if not, Im sure they could order something.

If both of those methods fail, try ebay?

If not that... maybe its time for a new bike?