Originally Posted by
DaveSSS
To get the CC calculator up to date, they need to list a specific STA and the HTL, with the headset. Otherewise, the average newb won't know that one brand's 52cm is the same as some other brand's 54 or 56.
Strongly agree with this. TT + Stem length says very little about reach if you don't know the STA and handlebar drop (ie HTL).
For example, I have one bike with a 59cm TT + 130cm stem and it has the SAME saddle to handlebar distance as another with 58.5cm TT + 110cm stem... Why? Because the former has the handlebars positioned higher.
The CC calculator seems to work for some, but I think the formulas they use break down at the extremes. It's an exercise in futility (for me, at least) to try to match all three of the saddle setback, TT + stem length, and saddle to bar distance numbers. So which numbers are you supposed to choose?