Wish I had thought of that button head bolt idea back in the day, a lot easier than thinning the crank spider or making and
mounting small ramps!
The comment about the Gitane shipping with a plastic attachment in the cranks in 1974 reminds me of current
compact/subcompact Shimano cranks with their black 'fillins' on the inside of the large chainwheel which may
facilitate downshifting, never thought about why they were there.
Last edited by sch; 05-13-19 at 09:02 AM.