Ken Norton wrote:
In those cases, you're constantly
changing gears as you zip down the hill and then back up the hill.
But the problem there is that I've had too many missed shifts and
slipped gears
What you want is one of these:
https://books.google.co.uk/books?id=BPsMp8KMONAC&pg=PA82&lpg=PA82&dq=deal+chainwheel&source=bl&ots=QTupLDp7JE&sig=Y2BWW1WBVo4rxqfTNU_SfWKYLSw&hl=en&sa=X&ved=0ahUKEwjT0JrPoKPOAhUUM8AKHWVNDawQ6AEILTAD#v=onepage&q=deal%20chainwheel&f=false
They apparently had a demo model at a cycle shop near me, although I never
saw it myself.
-- from Cyber "long time, no post" Simian in the UK
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