Originally Posted by
DaveSSS
Reach cannot be compared directly, between two distinctly different stack heights. To get the correct comparison, assume that 2cm of spacers would be used on the smaller frame and that reduces the reach by about 6mm. The figure the difference in reach between the two frames.
The spacers would be used to lift the stem? And you'd do that since the seat post would need to be 2 cm longer and to get the same position, you'd need to lift the handlebars 2 cm?