I really don't know much about tires and wheels. Where can I learn more about :

Benefits\Issues various wheel sizes?
Benefits\Issues various Wheel Construction (two piece vs forged, vs etc.)?
Benefits\Issues various wheel materials?

Ride qualities of variations in wheels & tires?

Thanks
:95

www.tirerack.com is a place to start.

Been there. Learned a lot about tire ratings. Didn't learn why I would want to upgrade to 18 inch rims, performance and handling gain/loss, ride quality with 18 inch or two piece rims vs once forged.

Any help?