Quote Originally Posted by Silvertop View Post
There ARE a few of us planning on using narrower tires. I'm planning on using 205/55-16's up front and 225/50-16's on the rear (on stock WRX wheels), and I know of at least one other forum member who is planning the same setup. And I expect that it will go around corners just fine -- probably well enough to handle any corner at twice the recommended speed. As has been noted elsewhere in this forum, the Lotus Elise, which is similar in design, size, and power, uses this same tire combination, at least in stock street form.

Of course, I'm not planning on putting down great bucketfuls of horsepower. I'll be running a moderately tweaked NA engine, generating maybe 200-210 flywheel horsepower. I'm also going to run a Quaife LSD to help distribute that power as evenly as possible to those (relatively) narrower tires.
You are right, I believe power/tq output will also drive the size of the tires, that's true.
If you were to run a Toyota Prius engine, I doubt you'd stick 265s in. lolll