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Shimano STI vs MTB Rear Derailleur compatibility


Bianchi boet

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Hello Hubbers. I have 9 speed Shimano 105 STI shifters on my cyclocross project. I am planning to use a Tiagra long cage derailleur with my 9 speed XT Casette. I was wondering though, is there a XT or similar MTB rear derailleur that is compatible with the STI? Thanks

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Think it will work, on the cyclocross page it was discussed. If it's 9 speed to 9 speed it should have the same pull ratio.

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Yes as Savage says it does work, I am using a 9sp Tiagra shifter with an XT 9sp rear derailleur on my MonsterCross with no problems. I had a road RD but it got wrecked while out on a local trail ... changed to the XT and no issues since then.

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9 speed is all interchangeable. I believe Shimano ruined things with the 10/11 speed MTB derailleurs not working with their road counterparts.

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  • 2 weeks later...

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