Campagnolo cassette lock ring thread size mystery

[bicycletricycle]

I am sorting through my bag of cassette lock rings, I thought I would find 2 sizes, one for 8 speed , one for 9/10/11 exa drive. Instead it seems that I found a third size of thread . Anyone know what's going on here.

Obviously they have different flange diameters for cog sizes.

I am talking about thread size.

[oliver1850]

there's an early nine speed (26mm) and a later 9/10 (27 mm). Eight speed is 29 mm I think, and the 8sp ones all say Brev. Int. on them so easy to spot.

[Look585]

I am sorting through my bag of cassette lock rings, I thought I would find 2 sizes, one for 8 speed , one for 9/10/11 exa drive. Instead it seems that I found a third size of thread . Anyone know what's going on here.

Obviously they have different flange diameters for cog sizes.

I am talking about thread size.
I need a 26mm 9s lockring if that is what you have. A bit smaller diameter than the current 11s?

[bicycletricycle]

That's it, early 9 speed. Pm me if you want to purchase it