Joined: Jan 2010
Posts: 9,814
Likes: 1,790
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
I normally remove and install such threaded rings using hammer and punch/screwdriver, but these rings are useless unless fully torqued.
This post got me to thinking that I could easily re-radius the ID of one of my extra lockring spanners, using a die grinder.
Thanks, JohnDThompson for listing the spanner with a flex-pivot. I didn't know those existed.