XTR M952 chainring rot

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They are later gen xt (m770) but do fit m970 xtr I believe.

Never tried them as alternatives to m952 rings, do they fit? Could be interesting if they do.
We used to see a lot of m950 series chainsets - i don't ever recall seeing a replacement ramped middle ring all alloy, so perhaps shimano changed the design early?
Techdocs ought to give a compatibility rating, although it's not always reliable.
There's an xtr 950 spider in the same drawer, I'll offer it up and post back👍
 
As far as I know, they aren't bonded.

If you have a load nocking around then I'd be up for one or two as I have a few xtr m95x chainsets on bikes I'm not looking to part with ever, but would like to ride them (more) and keep them running with a stash of spares.
IMG_20240604_153214.jpg Sadly they don't fit. 112🙄
I've got a couple of spiders, one looks double
... one looks single

IMG_20240604_154520.jpg
 

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Aye - inner & middle ring have gone really granular. Outer ring is fine bar the minor tarnish marks. What surprised me was the middle ring splitting - looks to be 2 parts bonded together that have now started separating.
Thats exfoliation corrosion. The corrosion migrates along the materials grain boundries its particularlly common in the higher strength alloys 2024, 7075 etc. I have seen bits of aircraft structure that looks like a well thumbed paperback :oops:
 
Thats exfoliation corrosion. The corrosion migrates along the materials grain boundries its particularlly common in the higher strength alloys 2024, 7075 etc. I have seen bits of aircraft structure that looks like a well thumbed paperback :oops:

Is there anything that can be done to prevent or slow it down?
 
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The one that looks like a double is a standard outer ring spider with the ring lopped off, making it a double.

Do you have any pics of the triple?
Of course - the outer ring was integral to the spider so effectively there's only 2 rings attached!
The other spider looks like single, ill look in the box downstairs as if I can find a triple
 
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