Joined: Jul 2015
Posts: 7,494
Likes: 3,296
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
is the top tube slanted to the rear any amount?
if so, Ignore the Seat tube spec completely.
i measure a phantom "top tube" in a horizontal plane... center of seat post to center of head tube.
57cm sounds about right for you.. or a 58, with a stem length you choose.
the angle of the seat tube and head tube also play into proper fit.... some diverge, others are the same angle......
Last edited by maddog34; 12-24-24 at 02:11 PM.