I have an old school TT bike, it's a Zipp2001 from 1993. Just had it repainted for the 5th time. I used it for ultra cycling events 12/24 hour events, will be doing some duathlons with it this year. I live in a very rolling area of our state and climb with it all the time. I run a 54/39 on the front with 3 different rear cog groups that I switch out depending on terrain. I have an 11/23, 11/25, and an 11/28.