M770 (FC-M770) 32T chainring - spot the difference!?!?

[Fatmat]

Hi guys, any idea why these 32T M770 middle chainrings are different? Mine have holes around the outside, the other one doesn’t! Both from a FC-M770 chainset, I’m guessing there’s a variant / different year! Can anyone explain? Thanks, Matt

 

[joglo]

Hi,
you've posted this in the section for Retrobikes up to 1997. Just saying this that you're not wondering about missing feedback for your question about certainly more modern bike parts.

Maybe ask the moderator to move this?

 

[FluffyChicken]

It was a post in both, so ignore this one.
Use
Thread 'Spot the difference - M770 32T chainrings' https://www.retrobike.co.uk/threads/spot-the-difference-m770-32t-chainrings.448977/