Here are some notes and stats associated with riding a Coker at 26mph:
A cadence of 116 (116 revs/min) is about 12mph. To go 13mph, up that
another 10% for a cadence of about 128. Now, to hit 26mph, just double
that last cadence: 256 revolutions per minute!
If that’s hard to relate to, 26mph is basically like pedaling a Coker at 4
revs per second.
Perhaps the rider who posted this speed (I’ve since chucked the e-mail)
would say that this speed was just momentary, but in order to hit 26, you
would have to be able to keep up 20mph for awhile before suddenly
accelerating to 26. And then there is the deceleration problem.
Speaking of problems, falling (esp with no protection) at that speed would
be nigh on fatal. The humans who can run that speed all have numbers on
their back and can be found passing batons to one another at the Olympics.
There is only one way I can envision someone hitting 26mph on a Coker, and
that is off a small cliff. Not counting air resistance, one would hit this
speed from a drop of about 38’ (a fall lasting one second). But that would
be hard to maintain on account of the rider being dead.
In other words, I don’t think anyone can hit 26mph on a Coker, period,
regardless of crank size, hills, tire pressure, etc.
BTW, I went for a ride today and at the end pulled off another 4min mile.
I was chugging, but had there been a better track, I feel I could have
pulled off a 3:45 or even a 3:30. Zipping down a decent hill, I’ve hit
19mph, and my brother has recorded 20mph. But there is a BIG difference bw
20 and 26mph (30% increase).