Joined: Jul 2015
Posts: 7,382
Likes: 3,226
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
Quill seat posts were a bad idea in the first place,,,
when combined with an ALUMINUM Frame, the bad idea becomes even More Destructive.
31.8mm seat posts are for Aluminum frames, and top clamping.