sturmey archer S1C is promoted as 'the coaster brake hub for adults' ..

Sturmey Archer | S1C Silver

The Quality of current S-A products is good. note the spec PDF in above link.

NB: 119_120 is common track and old 5 speed freewheel bike rear frame width Spec.

Why not just build a new wheel and not Jury rig. ?



I presume if you are already able to figure it out, the post would not have been made , and you would have done It.