The above link is a photo I took, last year, of the crankset on the Merckx Hour record bike in the Colnago showroom, in Cambiago.
Perhaps this could help determine the exact size of the crank?
It will be noticed, from the tires, that little has been done to maintain this bike.
George Hollenberg MD
> According to this article reproduced on the CR website, his
\r?\n> Mexico hour record bike had 175mm cranks:
\r?\n> Given his height and inseam, this is a bit longer than we mere
\r?\n> mortals would typically use.
\r?\n> Emanuel Lowi
\r?\n> Montreal, Quebec