Originally Posted by
jcb3
Confirmed - fits and works fine, only with a slight protrusion from the bolt head.
Just remember, the upper pivot spring tab stop goes on the front of the hanger
NOPE, not with the claw hanger Simplex SX100 RD in question. The 1960's early 70's Simplex Criterium derailleurs like the one you pictured came with a detachable claw hanger and would fit Simplex and Campy style dropouts.
See my post # 6 for more details.
NOTE: the hex openings in the Simplex upper and lower pivot bolts have plastic plugs and are
NOT for mounting or removing those derailleurs! They're for adjusting the pivot spring tension.
As you pictured the mounting bolt is on the inside of the dropout. Trying to remove the RD from the outside can easily trash it!
verktyg
Chas.