Is 225/55 17 bad for my car??

im going to guess because you didnt say what kind of car it is. if you have a sle or ssei the stock listed tire is 235/55, so the 225 would be 10mm narrower and a hair smaller diameter. the average person wouldnt notice but technically you would get less traction in all situations. typically you would feel the type and brand of tire change more than the difference in size that small. why do you want to get a smaller tire?

[QUOTE=mello;1545693]Is 225/55 17 bad for my 2000 pontiac Bonneville ssei?? I made a mistake and put thm on. Yes i have a 2000 pontiac Bonneville ssei. Jst wna know if I'm all the way bogis or can i pass??

i think youll be fine

nothing wrong with that size it works fine