Joined: Jan 2008
Posts: 9,145
Likes: 6,067
From: Boston
Bikes: 2022 Soma Fog Cutter, 2021 Calfee Draqonfly 44, 1984 Peter Mooney, 2017 Soma Stanyan, 1990 Fuji Ace, 1990 Bridgestone RB-1, 1995 Independent Fabrications Track, 2003 Calfee Dragonfly Pro
Why is it that when frames reach a certain size, the builders no longer build the top tubes proportional to the seat tube? Smaller bikes get relatively longer and longer top tubes and as you get over ~56 or 57cm, the top tubes get smaller relative to the increase in seat tube.
For example, a 56 x 56 is pretty common among most builders, but most 60 or 62 cm frames (the size I am always on the lookout for), only have 58 or 58.5 cm top tubes....