I've had my 21 speed Diamondback Insight One Hybrid Bike for about eight months now. I haven't used it for the past few months because of the weather. You guys on the East Coast know what I'm talking about. Just today I decided to bring the bike out for use cycling between classes at school. Lo and behold whenever I pedal, my wheels aren't turning and I fall off balance. That really impresses the girls.
My chain is catching the gears and they are turning but my back wheel is not engaging. I'm a relative novice at bike repair (I can take a wheel off though). What's going on and can I fix this on my own? Please help!