Shimano chainset comaptability

the_urban_spaceman

Hi all. Happy new year.

I need to replace my Shimano XT FC-M785 chainset (this is cira 2015, 10 speed).

Does anyone know whether I can use the Shimano Deore XT M8000?

NB the shifters are Shimano XT SL-M780-I, and the front mech is Shimano XT FD-M786.

Or does 10 speed have to replace 10 speed?

Thanks in advance

swod1

Cranksets don't matter so much I'm using an slx m7000 with a 10speed kmc chain on my old xtr 10speed setup.

The latest chainrings will be fine with 10/11speed chains the size difference is slight between the links etc.

Just remember to buy boost or non boost and the right crank arm length 170, 175mm etc

swod1

you could save some money if its a 104bcd size and fit a narrow wide chainring?

thistle_

If you are replacing the crank and the chainrings, no problem. Can't think of any reason why a 10 speed setup wouldn't work with an 11 speed chainring/crank.

If you were planning on reusing the old chainring, it won't fit: The XT M8000 uses 96 PCD and they are in a rectangular pattern, not square like on the M785. I believe this is so you can fit a 32T chainring if needed.

Make sure you get the correct chainring when it's time to replace it!

the_urban_spaceman

That's great, thanks all

The Rookie

thistle_(mbnw) said:

I believe this is so you can fit a 32T chainring if needed.
!

As you can fit a 30T to a conventional 104mm, I'd suggest if its for chainring size it would be a lot smaller than a 32t!