Right some tires only have a certain load rating. Some 205/40x16" might only be able to handle 800 lbs per corner and a 205/45x16" might be only 900lbs. So check to make sure it's safe too.
__________________
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