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Old 07-30-2010, 09:39 AM
Creative Engineering Creative Engineering is offline
Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,668
Default Re: A new shift concept for the engineers....

Originally Posted by Ghost0 View Post
Like the patent guy said, "everything has already been invented". Attached are pics of my first attempt at gearing a motorized bike. I too felt this was going to be a simple solution but it turned out not to be the case. Going with a derailleur on the left or right causes problems with a fixed rear sprocket and the want to bump start. But maybe you all can find better solutions to the problem than I was able to come up with.
Whoever made those sprockets didn't realize that the 10-11 degree bevel at the teeth is critical.

The chain plates will snag if there is even the slightest bit of mis-alignment.

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