Mountain Bike Reviews Forum banner
1 - 9 of 9 Posts

·
Freshly Fujified
Joined
·
8,199 Posts
You should be OK

Just make sure it's not a rapid rise derailleur, as the shifting will be opposite (e.g 8 on your shift indicator will be 1 on the cassette, and vice versa). I am running a set of XT integrated 8 speed shifter/levers with a 9 speed LX derailleur and it's fine.

FWIW, if you want an 8 speed XT derailleur, you can still get them new from places like jonesbikes on ebay. They also have a brick and morar store in CA if you don't care to buy online.

Best wishes,

Bob
 

·
Elitest thrill junkie
Joined
·
38,809 Posts
No problem, that will work fine.
 

·
Registered
Joined
·
2,850 Posts
8 speed and 9 speed derailleurs are one and the same rapid rise or high normal. The total cassette spacing for 8 and 9 speed is the same and since the indexing is performed by the shifter the derailleur has no impact.
 

·
uber-lurker
Joined
·
26 Posts
Hecubus said:
8 speed and 9 speed derailleurs are one and the same rapid rise or high normal. The total cassette spacing for 8 and 9 speed is the same and since the indexing is performed by the shifter the derailleur has no impact.
Is this also true for 7 speed derailleurs, or do they not travel enough (even with limit screws maxed out) to reach all nine gears?
Thanks.
 

·
uber-lurker
Joined
·
26 Posts
wddamf said:
The derailleur doesn't know what travel it is - it just does what the shifter cable tells it to do - so they all work on all cassettes. The shifter makes the decisions.
Understood - I thought maybe the parallelogram of the 7 speed rear might be too short for the as-yet-unthought-of additional width of the 8/9 speed cassette.
But a 7 speed rear won't work on all cassettes, correct? They still must stay within certain max and min teeth? Or is that just a matter of cage length?
Thanks for any clarification.
 
1 - 9 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top