On 02/26/2015 03:10 PM, Bill Lindsay wrote:
Brewster
My Bombadil is quite stiff. Bikes that "plane" are really flexible.
My Bombadil does not plane. My Rawland Stag with 7/4/7 standard
diameter top tube and downtube does plane. My Bombadil is very stout.
I use it for camping and trail riding. At times, I am carrying most
of the gear for a family of four. When my bike weighs over 90lbs, the
extra few ounces of the second top tube does not bother me.
When your bike weighs 90 pounds, a 2nd top tube may actually be doing
you some good! I'm happy to have a diagonal tube on a tandem, too.
Jan notwithstanding, I had a French tandem once with twin external
laterals. They were decorative and made a nice place to cradle a water
bottle, but provided no lateral stiffness whatsoever.
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