I recently purhcased a TW and am using it to commute to work and back. I find it to be comfortable to ride top end around 40MPH. Anything faster and the bike seems a bit squirrley. I know a fellow that has a TW also and he says he can run it 60MPH with no trouble. So I am wondering what others out there are comfortable running their TWs at on the highways. 35-40MPH and it's great but anything faster for me seems a bit hairy. What say you all?