Rear Derailer Placement: Replacing Chain
I'm trying to replace a chain on a road bike. The lower pulley on the rear derailer is sitting so far forward of the upper pulley that the chain won't even catch on the upper pulley. How do I fix this? I did some extensive googling, but I haven't come across any images where the rear derailer is positioned the way this one is.
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Have you got an image you can show us?
Sounds like it may be a busted derailleur but I could be wrong!
Your description makes it sound like the chain's miles too short, but even then the chain would still contact the upper jockey wheel.
Upload the picture to an image hosting website such as Flickr then paste in the URL. Instructions in a sticky at the top of the forum
Looks to me as if the cage has rotated clockwise so the spring's no longer effective. Can you turn it 360 deg anticlockwise so you feel spring tension again? You might have to take it off the bike to do it.
Either that or the spring's broken and you'd need a new mech. A Sora mech is pretty cheap.