[Molez93]

The shorter sidewall gets you better torque. I’ve been trying to use up some 245/45 sized tires at the track: They came with car when I bought it; figured why not...

A basically stock BRZ walked away from me on a 1/2 mile long straight at the track. There’s almost no chance I was down on power compared to his car. Obvious difference was tire sizes- My 245/45 vs his 245/40.

The track isn’t the same as an autocross course, but the impact of that taller tire will still cost you power to the ground. I think you’ll be happier with the shorter sidewall unless you can save a bunch of money on the “wrong” size.