Depends on whether or not your insurance is paid up or about to lapse, both life and health. If its a front wheel and its time comes best hope that its not at speed and/or in a turn. [MENTION=190941]jimmuller[/MENTION] has about the best thoughts I have read concerning cracked rims, above my reply.

I doubt it will actually be a catastrophic failure though, it will begin to lengthen with the stress a rim undergoes and it should be readily visible as it progresses. I'd be looking for a like replacement, if you want to keep your Schwinn as originally specced, or another set of suitable rims to lace up. If you are looking to change things out, a wheel set can be had either new or older. Be safe and best of luck either way you decide.

Bill