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stumpie · **Posts:** 1266 **Location:** Ockendon

I've a XT M780 chainset:

I need a new outer chainring as it's currently sharp enough to cut stone...

Thing is I can only seem to find outer chainrings for the M770 and that looks like the arms are a different design:

It could just be an optical thing - does anybody know or have any experience?

Then given that I have the M780 - does anybody have any alternative suggestions to the Shimano chainring that is £50+?

David

Turner5 · **Posts:** 238

Same BCD 104. The holes are in the same place and would be interchangeable. I have a spare 36 t ring with a pin missing. U could borrow to line it up if u wanted to check.

stumpie · **Posts:** 1266 **Location:** Ockendon

Thanks Ade, I managed to get a 780 42t ring on ebay so it will still look the same...

NickTKS · **Posts:** 715 **Location:** W.Thurrock, ESSEX

Ones 10spd, the other is 9spd.... Chain ring will be slightly thicker, but dont think you'll have a problem.

stumpie · **Posts:** 1266 **Location:** Ockendon

Nah, 770 comes 9 or 10 speed mate.

Got a 780 in the end anyway so the Corratec should be able to cope with the big ring

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XT M770 & XT M780 Outer Chainrings

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