Joined: Feb 2012
Posts: 19,344
Likes: 5,462
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
Dave- At least one of the greats in modern building (and is well known for his CX team) has said that the BB drop doesn't need to be less on a CX bike, the taller tier will lift up the height anyway. But with a fixed gear ride (and I know that's not what you plan) the not being able to time one's pedal stroke and terrain stuff suggest less drop is a good idea.
As to folding bikes- mine have all been 3 speeds. I choose the high gear (3rd) to be my flat land steady riding ratio. This way the two lower gears get me up and over the hills (since many folders seem to lack a certain efficiency). Andy
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AndrewRStewart