When I first bought my Sky it was equipped with the Goodyear GSA's. They were 245/45/18. First problem I had was the they rubbed in the rear. Second wet traction was horrible and finally they were too soft in the turns. I decided to swap the tires out for Toyo Proxy 4's. I went with 245/40/18. Not only did the rubbing go away wet traction improved probably 300%. Dry cornering improved so much my Sky now puts my heavily modded WRX to shame in the twisties. Last by going to a 40 series from a 45 series it increased acceleration. I highly recomend this swap to all Sky and Sol owners.