Time to upgrade my pizza cutters on my 2000 CSVT. I would just like some input on some 17s or 18s. I reaaly like the look of both 17s and18s but i live in the hills of Pennsyltucky and the roads aren't the best. So i have questioned the 18s, but i just dont want to get the 17s and say...man i should have got the 18s.