Hey peeps,
I had a look at some S bags and Deluxe hydo bags (displacers) today, to see how to ID them apart.

Once upon a time the S ones were colour coded on the hoses or the outside, but often you can't see it now after 30+ years.

Anyhow, all the S ones (double orange, and silver) I saw measured 20mm from the rim down to the rubber bag, the others were 30mm. I guess the rubber part is thicker on an S, to make 'em stiffer..

Just thought y'all would like to know how to tell.

BTW, I run late S/GT ones on the front and MiniMatic (same as Mini-K) on the rear. Just turned out that way, but works for me.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.