"Ernest Scribbler" wrote:

"Charlie Morgan" wrote
Those foldup things may save some room, but they have small
diameter wheels that make pedaling them a chore.

Not all of them: http://blizzard.zmm.com/bicycle/ (I've never taken mine
sailing, though.)

Our children gave my husband a full size folding bike and a bike bag.
The wheels are regular size. The only problem with it AFAIA concerned
is that I can't sit on the seat and reach the ground even with my
toes, and the seat can't be lowered any more. So Bob got a second
hand folding bike for me, and reconditioned it and made a Sunbrella
bag for it.

We stowed them on the aft deck (center cockpit boat) lashed to the
lifelines, but this was inconvenient because the ladder was back there
too. And they do rust