Joined: Feb 2012
Posts: 19,344
Likes: 5,461
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
I won't speak to the geometry specs but will suggest that over size tube diameters be used. The biggest frames that I've been involved with have been over 70cm but with traditional diameters (although very thick walls). Both frames were pretty flexy for their riders. Andy.