Rick ~ I wasn't trying to break'em loose Saturday.........just trying to get rid of a little carbon build-up from "HELL HILL"!!!!
I have ridden in an SPF with a 514 and 17's.....the car hooked up soooo much better and in turn seemed to be alot quicker. I could feel a harsher ride with the 17's but then again we surely don't buy these cars for the ride

.
If it wasn't for the fact that I like the "period correct" look of the 15's I would have purchased the 17's. Still might someday.
Brian