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@tallsam
I realise this isn't the best place to ask questions about bikes with gears but from what I know lots of you still have and ride geared bikes.
Anyway my chain hasn't been sitting right on the chainring (front) of my commuter bike. It kinda sits off the teeth a little bit. This slips under load too. I put up with it for as long as I could but on Friday it slipped and I went into a BMW. Low speeds so no damage to car or me thank god. But it could be worse.
So I begrudgingly forked out $35 AUS on a new Shimano Narrow chain (6/7/8 speed model - my bike is a 6). Fitted it just now. Forgot to take out any links so had to undo all my work and remove 3 links which seems to be the same length of my old chain, although I didn't measure. Anyway time for a test ride:
Chain kinda jumps and slips every rotation under load when in high gears (small at rear). When I shift up to lower gears (larger at rear) I don't get this problem as much. Big at front and big at rear gives me no problems at all no matter how much pressure I exert (although I don't use this gearing much for obvious reasons). However small at front and small at rear jumps all over the place.The problem gets less the bigger the cogs I put it in (lower gears). You get the idea.
I realise I should be getting a new cassette and chainrings (maybe even jockey wheels) when I replace the chain but finances mean I can't. Also fitting the new chain has sorted the problem I was having previously. The chain sits fine on the front chainrings and doesn't slip from them. However the jumping and slipping that its now doing appears to be coming from the rear.
I've all but ruled out a stiff link. I'm thinking its an excess of chain and may try taking out a couple more links. Thing is it "looks" right the length its at right now..
I'll have a play with the rear dérailleur adjustment and get back to you. It's gonna have to wait an hour or two though cause I have something to do. In the meantime does anyone agree/disagree/have any suggestions etc...
Cheers