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May 25, 2018, 11:42 a.m. -  Ceecee

What if we change the designation from actual seat tube angle to seatpost angle? The closer the seatpost angle is to the ESTA, the more meaningful the ETT. Taking crude measures from a 5010, I estimate that for every cm of saddle height above the horizontal ETT line, the actual top tube--measured from center top of head tube to seatpost axis atop saddle--increases about 4mm. I can see why manufacturers don't want to get involved in providing charts on this, but it's not that complicated to observe that the difference between seatpost and effective seat tube angle is more pronounced on a Warden than on a Meta 4.2, for example.

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