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09-10-03, 06:19 AM
Hey,
When shifting the rear derailleur on my bike I've noticed that I can shift perfectly when on the smaller 4-5 cogs, but as soon as I move towards the top 3-4 cogs it seems as though the cassette and the derailleur become misaligned. This causes the chain to twich back and forth between cogs. When on the largest cog if I hit my index trigger to shift into a smaller cog the chain doesn't move. I have to hit the index twice and then it shifts off the top cog and down two but still tries to jump onto the second from the top cog. As I move down to the lower 4-5 though the alignment is perfect, the shifting is smooth, and I have no problems. Can anyone suggest what I might do to fix this? I have a SRAM 8-speed rear cassette with an alivio rear derailleur and Shimano 8-speed rapidfire shifters. Thanks!
When shifting the rear derailleur on my bike I've noticed that I can shift perfectly when on the smaller 4-5 cogs, but as soon as I move towards the top 3-4 cogs it seems as though the cassette and the derailleur become misaligned. This causes the chain to twich back and forth between cogs. When on the largest cog if I hit my index trigger to shift into a smaller cog the chain doesn't move. I have to hit the index twice and then it shifts off the top cog and down two but still tries to jump onto the second from the top cog. As I move down to the lower 4-5 though the alignment is perfect, the shifting is smooth, and I have no problems. Can anyone suggest what I might do to fix this? I have a SRAM 8-speed rear cassette with an alivio rear derailleur and Shimano 8-speed rapidfire shifters. Thanks!