Originally Posted by
Sy Reene
That's what I'm saying. The only way a fork can impact stack is if you're comparing 2 identical bikes but only the length of the fork differs. ie a longer fork would raise the front end (HT) of the bike higher off the ground a bit further than the BB would be raised.
From sheldon:

Yup, got it. Finally. Thanks. I always imagined that with a taller fork the increase in height of bb would be same as headtube height increase. Did not think that the rear axle will not rise.