Please could someone help me? I'm having trouble with the rear gears (Deore) on my Scott Tampico mountain bike. Basically I just can't get them to index properly. If i tighten the cable enough so that the chain will wrap the biggest cog, then I can't get the chain to wrap the smallest cog - and if I loosen the cable so that the chain will wrap the littlest cog, then I can't get it to wrap the biggest. I've tried slackening the cable and tightening it bit by bit, but I still have the problem just described. And also, more generally I just can't seem to index the larger cogs. If I tighten the cable so that I can get into a low gear (i.e. big cogs) then I have to do two or three clicks on the gear changer before it'll change down.
I've tried replacing the chain - didn't help.
The limit screws are set correctly.
I don't think anything is bent.
Any suggestions anyone? I'd be very grateful for your help.