I'm not wishing to spoil anyone's fun here, but I think Nick is right. The chain is used because it's the best all round solution.
Best wishes,
Chris
friction material
Jan 16, 2007
23 Replies
mmm Same principal using a chain may be viable on 20' wheels
-- olmo
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James, Since your first post on this subject, I have been in contact with a friend of a friend in France who collects/restores Solex motorised bicycles. These have a particular reputation for reliability and so I assume they have a good solution to this problem.
He does not have good English and I don't speak good enough French to enter into a detailed engineering discussion but there is a reasonable photo of a waisted drive pulley which runs directly off the crankshaft.
Look on Ebay for item no 320073276017
Hope this might help you.
Bob
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