wrote:
On Oct 2, 3:13 pm, thirty-six wrote:
On Oct 2, 7:00 pm, wrote:









On Sun, 02 Oct 2011 11:31:18 -0400, Frank Krygowski

wrote:
wrote:
http://www.gizmag.com/spokeless-bicycle/14216/

Intricate gearing:
http://www.gizmag.com/spokeless-bicy...icture/110818/
http://www.gizmag.com/spokeless-bicy...icture/110819/
http://www.gizmag.com/spokeless-bicy...icture/110820/
Cheers,

Carl Fogel

Those pedals better be held in with Loctite. Because they probably
didn't spend the money on a tandem front crank.

Dear Frank,

The "Shimano" on the crank is upside-down, so they must have used an
ordinary crank that was handy:
http://www.gizmag.com/spokeless-bicy...icture/110820/

There is indeed a reason why pedals come with left-hand and
right-hand threads, but this oddball probably won't be pedalled far
enough to reveal the problem.

Cheers,

Carl Fogel

It's for speed of assembly. With the bike held in the air by the seat
pin, the pedals are threaded on together by turning the cranks
backward. It's a simple single operation used to cut production
time. A pedal spanner is applied with the wheels on the ground and
cracked tight, leaving the cycle safe to operate. The direction of
thread is unimportant, a pedal may still come off if it is not
cracked tight. I have seen this happen with steel axles in steel
cranks.

Assembly speed? Maybe so, or at least that might be one consideration.
At what point does the chain get put on?

I've seen a Campy steel axle pedal come out of a Campy alu crank arm
in use-- a new pedal and crank, maybe 20 miles max into the first
ride, and the pedal was not, according to the post-accident
investigation, tightened "tight". It was a right-side pedal btw.

When I used to rent track bikes at Alkek Velodrome, one "overseer"
took me to task for using the leverage available in the pedal wrench.
Um, corrected later in the infield while supervision was supervising
elsewhere, thank you very much. I always just figured the pedal
spanner had an unusually long handle on it, compared to the other
"hand tools" for good reason. Only one of which "good reasons" was
getting tight pedals off g. After Reading Jobst, I would think that,
while a very tight pedal spindle might still fret a crank (arm) (g)
around the pedal eye, it should fret less than a looser one.
--D-y
thirty-six,
When do you think the pedals are installed? New bikes are shipped from the
factory with the pedals not installed, to reduce the size of the packaging.
I've never seen a bike shop mechanic install pedals in the way you
describe - all the ones I've seen install one pedal at a time. My years in
the shop happened a long time ago, though. Any current shop mechanics want
to weigh in?
Thanks,
Kerry