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Gear adjustment following cassette replacement

The SpidermanThe Spiderman Posts: 5,625
edited July 2007 in MTB workshop & tech
Swapped,an SRAM PG950 for a new XT casssette and a new PC991 chain.Gears which changed OK before,are now not indexing properly.Is this normal?

Thought the dimensions of both cassettes would be the same,so this would be unecessary?
2006 Giant XTC
2010 Giant Defy Advanced
2016 Boardman Pro 29er
2016 Pinnacle Lithium 4
2017 Canondale Supersix Evo


  • Although it's true that both are 9-speed cassettes, it's not unusual to end up a little bit out on the adjustment. Half a mil will make a difference. You should re-set your top and bottom limit stops and then adjust the indexing according to the Shimano instructions. Write back if you need more.

    What tree ? ...........

    Trek 8000 ZR XC hardtail.
  • nicklousenicklouse Posts: 50,675 Lives Here
    as the android says it is offten needed and there is not guaranteed start position for the cogs as they as a slide on fit and a lot depends on the hubs. but if you replaced sram with sram or you do shimano shaimano next time there should be no need to re index.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
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