Originally Posted by
kenshireen
I am the OP.
I am not an engineer and really don't understand the charts but from I am gleaning from this is that
there is no discernible difference between riding the big chainring or the small other than you might save some chain wear.
How to pro racers handle this... do the stay in the larger chainring so upshipfting is easier?
A lot of it is going to depend upon what's ahead of you.
If you see a big hill/incline ahead of you, use the smaller chainring/cog combo.
If you see a flat or downhill, use the bigger chainring/cog combo.
GH