too bad about your shoulder.
which lockring? are we talking about a FG bike? or is it the BB lockring on the adjustable cup?
if your refering to the lockring on the cog, how did you tighten it? did you have a chainwhip and a lockring tool?
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk