Originally Posted by
Jim from Boston
Here's a corollary question; any good way to mark seat tilt? My seat occasionally seems to lower the tilt, and it takes a couple tries to get it right, mainly by eyeballing the angle.
IME - there's no way to perfectly mark and duplicate seat tilt. I use a straight edge and roof slope gauge to duplicate the tilt. However, it's only useful when replacing a post on the same bike, or using an identical saddle on a new bike. Otherwise, various saddles each have their own sweet spots, so matching an angle is only a place to start.
BITD - way back, Campagnolo made a gauge for matching both the height and angle of saddles, to make it easier to set up multiple bikes for the same rider.