Hi all, need a bit of help from someone with some slx cranks to hand . I’ve just got a new set of slx m665 cranks, started fitting them and noticed there is a no o-ring on the non-drive side arm. I havn’t had slx cranks for a while but I think I remember the old models having an o-ring pressed into the arm. Do the m665/more modern versions not have this or am I missing an o-ring.

Its this model I have:

Thanks!

I’ve got those no O ring on mine…

I don’t remember an o-ring on any of the ones I’ve had.

Thanks for the replies, sounds like I’m not missing anything then.

I’m sure one of the older shimano cranksets (xt or slx) had o-rings pressed in – see this pic:

So was just checking I wasnt missing one.

Looks like you should have o-rings…

Shimano Tech Docs

😕 That does look like there should be 2 o-rings included. Should be fun sourcing a spare one of those 😕 🙄 – I’ll have to see what I have in my spares box. (I know it’s not exactly a critcal part, but anything to stop mud getting in the bb this time of year.)

well i never…

my SLX’s have O rings

Found my nds crank didn’t have an O ring after taking them off for a clean, assumed I’d lost it – like you do 😳
Went to LBS who said it should be there but sometimes missing from OEM/unboxed parts, they ordered me one from Madison, cost less than two quid as I recall and came in a few days……..