I've told a dozen people about the 18" 275s from M&H and most insist on going wide. The 18 x 275 is a phenomenal tire. M&H's simply hook. If I was running stock wheels, I'd be all over them. The only downside is you have to have the gear to run the 28" height.
bj
07-09 gt500. What is the best tire size for a 20" rim for street use?