Quote:
Originally Posted by EricH
Bicycle idler sprockets routinely have a serpentine chain wrap--more than you seem to want.
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true, but they cheat and make sure there is very little chain tension on the part of the chain with the derailleur (the part with all that wrap). The loaded (top) part of the chain is a straight shot from crank sprocket to wheel hub sprocket.
One thing we learned in 2006 is that if you use the "elegant" solution of making the axle moveable to adjust chain tension, that you really do need to make it elegant, not just a bolt thru a slot.
One thing we learned in 2007 is that the idlers/tensioners need to be part of the initial design concept, it's not easy to just add them in later and have it all work out.
In other words, I don't have an easy answer for Madison!