What side of the lockring are you using?
Per Surly you should only use the lip side of the lockring if the cog overhangs 1.5mm.
I installed mine with the lip towards the cog and all seems fine, but I have yet to be able to ride hard as I'm still recovering from injury...
It seems to engage more threads with the lip facing in, but I'm not sure the cog over hung a whole 1.5mm
Just wanted to see if anyone else was using the same combo and which way they placed their lockring.
Current custom builds: FG=KHS Flite 100 DH=Transition Blindside FR=Transition Bottlerocket
I have it the same way. Not sure if it hung out quite that much either, but the lockring mated up great and has stayed snug. I've had the same combo as you for over a year now and no issues other than the usual preventative maintenance tightening.