Quote:
Originally Posted by robt57
IIRC, the Origins have the lower stack
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Yes--IIRC they had the same stack height as the original frames, and then they added the higher stack height (shorter TT and taller HT) "Optimum".
Ultra geo was the same as the Origin/original frames but was 15 percent stiffer with a different carbon weave.
https://road.cc/content/review/19795-look-optimum-585