Originally Posted by OSX2000
It wouldn't. True, it takes a hair more power to roll the wheels around, but the speed increase compensates for the most part.
Sluggish? That's one hell of a no.
Yes sluggish. A stock Civic size is 185/65x14" or 195/55x15", which is 23.3" in diameter. I tried a 215/45x16" tire and it was 23.7". That 1/2" taller tire size equals a longer final drive ratio. A longer final drive will make the car accelerate slower. While you might not feel it it's definitely going to make 0-60 and highway merging a little bit slower.
A 205/55x15" is even taller at 23.9". Right now I run a 205/50x15" and it is 23.1" in diameter which helps shorten the final drive and make the car accelerate quicker.
You might not notice all of this using a butt dyno, but it is already proven.
__________________
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