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Quick sanity check as sure it will be OK.
I have a spare SRAM PCX1 11 speed chain which I no longer need for my Mtb as I’m now on 12 speed. I need a new chain for my road bike which is 11 speed Ultegra, I assume the SRAM chain will be just fine?
Thats what i’m running so yeah…should be fine. Just be careful of different wear. Apparently! Cant say i’ve had problems but ant mechanic would say dont mix old /new and so on.
12sp will run on 11 sp too. Tis only the out dimensions of the chain that vary. 11-12sp have same internal spec. I had clearance issues so swapped all my 11sp to 12sp chains.
Only issue i have found is KMC chains are recently shat. And internally 11sp chains are too narrow for SRAM 11sp mtb mech jockey wheels.
Yes, I've run SRAM chains on 11spd Shimano, in fact they used to be my first choice but Shimano chains seem to be a lot better these days.