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xt rdm781 rear deraileur


Johnny 55

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Posted

Noooo you didn't just say that  :whistling:

 

I'm running a 1x10 setup with a sunrace 42-11 cassette.

 

Even with the longer B screw, my 10 speed XTR derailleur battled to handle the larger diameter cogs (Shimano literature specs the derailleur for 36T max).

 

I did some reading into the subject and the new M9000 XTR rear derailleur (11 speed) is designed for the larger gear ratios and shifts with a curvature through the upwards gear changes, which allows it to handle up to 46T.

 

I purchased a M9000 rear derailler and fitted it to my 10 speed drivetrain (10 speed cassette, chain and shifter) and the shifting is smooth and crisp. The derailleur simply follows the shifter cable pull, so it only shifts 10 gears as that is the allowance in terms of cable pull. I don't see why the SLX version wouldn't work in this case?

 

Should I ever decide to upgrade to 11 speed, I just need to replace cassette, chain and shifter and off I go.

 

*edit: Spelling

Posted

I'm running a 1x10 setup with a sunrace 42-11 cassette.

 

Even with the longer B screw, my 10 speed XTR derailleur battled to handle the larger diameter cogs (Shimano literature specs the derailleur for 36T max).

 

I did some reading into the subject and the new M9000 XTR rear derailleur (11 speed) is designed for the larger gear ratios and shifts with a curvature through the upwards gear changes, which allows it to handle up to 46T.

 

I purchased a M9000 rear derailler and fitted it to my 10 speed drivetrain (10 speed cassette, chain and shifter) and the shifting is smooth and crisp. The derailleur simply follows the shifter cable pull, so it only shifts 10 gears as that is the allowance in terms of cable pull. I don't see why the SLX version wouldn't work in this case?

 

Should I ever decide to upgrade to 11 speed, I just need to replace cassette, chain and shifter and off I go.

 

*edit: Spelling

 

Have you ever heard of the phrase 'false equivalence?'

 

http://www.myjewishlearning.com/wp-content/uploads/2016/11/False-equivalence-graphic.jpg

Posted

If you want to go 1x it isn't strictly necessary to have a clutch. You could use your existing derailleur. I have been running 1x9 since December with a N/W chainring and the chain has only come off once. In that instance I was pedaling backwards so think chainline was more the cause than tension.

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