I like the 18 but not enough to give up the grunt of the 17. My bike came wit the 18 stock, and it saw about 2500 miles before I changed it. I run 90% in town, with the exception of a 3 mile jaunt down the slab at 75mph to the gym at lunch. I turn about 4200 at 75. I'd like to try the 16, just for grins.
