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I've just changed a worn out cassette on my road bike (SRAM 8 speed 12-26T) and replaced it with a Shimano 12-25T 8 speed cassette. Now it looks like my gear shifting doesn't work. I can't get into the lowest gear, and there's a clicking sound when I try. I know almost nothing about derailleurs. What is my best option now?

  • You probably need to rearrange your limit settings, you can have a look at this video, if the limits are not set correctly the chain could either fall off the cassette when going up or not being able to reach the smaller cog when going down. – Ende Neu Sep 4 '15 at 12:55
  • Do remember to check and adjust the limit on the other side of the cassette too - having the chain jump off the end is no fun either. – Criggie Sep 5 '15 at 8:09
  • Ende, your comment should be posted as an answer. – Carl Sep 6 '15 at 2:16
  • @Carl I wasn't sure that was the actual solution, I wanted to wait until I had confirmation. – Ende Neu Sep 6 '15 at 11:34
  • Also note that you should generally install a new chain when you install a new cassette. – Daniel R Hicks Sep 6 '15 at 11:44
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As I stated in my comment,you need to rearrange your limit settings after switching the cassette, you can have a look at this video, if the limits are not set correctly the chain could either fall off the cassette or not being able to reach the smaller/bigger cog.

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