[Kerry Irons]

Specifications

When installing the lock ring on a shimano cassette, how much torque should be used? It seems to me that once things are snugged up, that should be sufficient, given that pedalling is only likely to make things tighter.

IIRC, 35 n-m is the specification for Shimano cassette lock rings. That's "pretty darn tight" though not as tight as Campy, with a 50 n-m specification.

If anything, pedaling action will tend to loosen a lock ring that was not properly torqued. It's not like you're putting any tightening torque on the lock ring due to pedalling action.