Originally Posted by
maddog34
backpedal derail, if i had to put a name on it... happens at higher chain tensions., and especially on short chainstay bikes..
the chains have built in flexion... when that is overcome by tension, the chain tries to derail when they move in a reverse direction, with no derailleur to guide it.
i work on a lot of kid bikes with short stays... and the kids Love to backpedal...
the wheel probably rolled backwards while you positioned it for the pic.
i voted "too tight", BTW.... in lieu of a pic with the bike shifted to small.
compromises need made at times when pushing the envelope, eh?
That's right. When I started this thread, I was actually thinking of taking out two more links as the RD still has slack capacity, but now I am staying put at 114 links as shown in the image for I may add a larger chainring, up to three additional teeth, at a later time. It's all good as it is for now. This is what it looks like with the RD at its lowest position, yes, a game of compromises.
11-50T cogset