Originally Posted by Triguy

I think more than anything your chart shows two things:
1. Use stack and reach, always.
2. Cervelo went through a change in belief about geometry between the S2/RS production and the new R3 production. Clearly from comparing to the S2(which used to share the R3's geometry), if a person wanted a "relaxed geometry" bike, they could go with the RS and see significantly different stack to reach combinations and different handling characteristics. Now, Cervelo's R3 geometry is "supposedly" built to work for their pros and the everyman. The stack and reach are almost the same, despite head tube length differences, because of the new Cervelo fork's longer Axle to Crown. So one chooses the RS as a comfort bike more because of it's price, tire clearance or slight changes in head angles or wheelbase; not because of a higher handlebar position.

Anyway, I'm starting to see murmurs of the possible "offing" of the RS because of its redundancy in the new Cervelo line up but thats just rumors.