Also depends on what size tires you have in the rear. I like my 3:55's with a 28" tire. With a 28" tire I also would not be afraid of cruising the highway with 3:73's either. I had 3:91's for a couple years and it was fun, but the highway was a bit much for trips over 1.5 hours. I'm not a sissy, but the rpm's and noise get annoying.