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Let's be honest here - most tyre fitters would not know the difference between lbs/ft and Nm? The way they use the air gun to fully tighten one nut with no progression is proof that they don't know what's going on or they don't care anyway! I've had to use a 4ft extension to undo wheelnuts before now. Stuck at the side of the road with no chance of removing the nuts is not a pleasant experience!
I always use 100 Nm tightened progessively.
JohnD