Bike Forums - 9 to 10 speed compatibility.

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Postie Paul

03-31-17 09:35 AM

9 to 10 speed compatibility.

I have an XTR RD M960 9 speed long cage rear derailleur and I'm building up a Surly LHT. I would like to run a 10 speed triple set up. I have some 10 speed 105 shifters and a 10 speed 105 front mech. Will the 9 speed XTR work if I buy a 10 speed cassette ?

headasunder

03-31-17 09:45 AM

Yes

Tim_Iowa

03-31-17 10:16 AM

Yes, it will index perfectly. So long as you match the shifters and FD with the correct indexing standard, the shifter controls the indexing.

Your 10 speed road shifters and your 9 speed MTB RD both use Shimano's legacy "SIS" cable pull standard, so you're good to go.

I've built bikes with 10-speed 105 ST-5700 brifters and 9 speed XT RD-m772, and the same RD with 10-speed BS79 bar-ends.

Just make sure you have a ST-5703 left shifter and FD-5703 front derailleur, for your triple crankset.

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