Hi there, I have recently changed a chain on my bike and got the dreaded jumping chain syndrome, so I bought a new rear cassette of a little better quality and I still get the jumping on one cog ( the second smallest) I have ajusted the the deraillers, every thing seems fine but it still jumps. If I replace the wheel with one from another bike all is ok. Any Ideas? could the new cassette be defective? Any insight would be a great help.
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