Minimum stack of the 54 is 639.
Just for the record, I don't believe in this kind of stuff: "this is the first triathlon bike, so the position is not so aggressive now"
I know it sounds like wisdom but unless you expect a body composition change, there's no reason you shouldn't be riding in an aerodynamic position now. You are welcome to choose not to, but the fact this is your first triathlon bike doesn't limit you as much as conventional wisdom would lead you to believe.
That said, if you are expecting to drop 10+% of your body weight as you train, then that can potentially allow a more aggressive future position than you can initially sustain.
Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)
Just for the record, I don't believe in this kind of stuff: "this is the first triathlon bike, so the position is not so aggressive now"
I know it sounds like wisdom but unless you expect a body composition change, there's no reason you shouldn't be riding in an aerodynamic position now. You are welcome to choose not to, but the fact this is your first triathlon bike doesn't limit you as much as conventional wisdom would lead you to believe.
That said, if you are expecting to drop 10+% of your body weight as you train, then that can potentially allow a more aggressive future position than you can initially sustain.
Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)