I bought these from a blind Ebayer who thought they were a match.What I would like to do is swap 1 to create a matching pair for a CAPO project bike. I'd like to use TA chainrings with a pair of steel arms. Right NERVAR is French threaded while Left Williams is Eng threading.Both are 170 MM length.
BOB FREITAS
project bike
central MILL VALLEY,CA
http://www.wooljersey.com/