When you look inside the drivers door "hole" you will see a white sticker at the back --on it will be the factory wheel/tyre size.
I suspect it is 235/50/18. If you have bigger wheels with lower profile tyres it will make the ride more harsh -eg 235/40/19
if the wheel/tyre size is factory then shine a torch Up under the fender behind a front wheel. The shock absorber sits there.
You should see a black shock and black coil spring. If either are any other color then that means after market suspension has been fitted.
Whils in there -towards the top of the shock inside the spring is a rubber boot. If its torn or just loose slide it aside and check the shock isn't leaking oil.