As Stuaff says they very the cassette they use depending on the stage parcours, if you can run a minimum of 39x24 your either a cycling god, live somewhere flat or like to grind
hi, it's just what's on my bike. I manage Northumberland hills okay, but I'm no cycling superstar! Just a middle aged guy with dodgy knees.
Is it Jens Voigt who's used a 56 up front?