track only tires aside.....
in performance street tires, 17's are yesterday's news. and 18's seem to be fading away.
wide(315's or bigger) 26" diameter tires just look too short and stumpy under the back of a 69. and with my 1" diameter stagger front to rear, I would have to run a 25" front tire. now, there goes another 3/4" of ground clearance that I don't have.
I would love an affordable, non drag radial, 27"-28" diameter rear tire to fit a 11"-12" wide 18" diameter rim. but it isn't out there. it seems that 19" is the min diameter that you can get a nice wide rear tire in now that is more than 26" tall. yep, lots of options in 19's and 20's.
I know you track guys hate it, but 19's and 20's are the here and now.