You can fit 215/40x16" tires on a 16x7" 42-44mm offset or 16x7.5" 42-43mm offset (pushing it) wheel. Speedo will be off.
You can probably fit 225/45x15" on the fronts and 205/50x15" on the rear of a CRX but it will be tail happy.
__________________
Sponsored by: KAM Racing Sports, Falken Tires, Progress Technology, Brady's High Performance, Taggart Performance Engineering, Rotora Brakes
Autocross is: 90% driver, 5% car, & 5%
CRAZY MOJO!
Autocross Help Page