Originally Posted by
JohnDThompson
Pro tip: you can often find bikes with Ashtabula-type cranks using the 5/16" balls on the curbside, set out for trash pick-up, often kiddie bikes with 16" or 20" wheels.
I combed the neighborhood for kids' bikes, but no luck. Finallly used a thumbscrew (like the ones you often find on PC housings) as a 'adapter". All it takes it a dab of grease to hold it in place. Works perfectly!