Originally Posted by
JohnDThompson
On frames lacking an integral derailleur hanger on the dropout, the bolt-on "claw" acts as the spacer, and the non-drive side slot would have a spacer to help ensure proper wheel position.
But so few claw-mount bikes even have the non-driveside adjuster, no? I know that I've had to add a few on...
Country of origin seems to be a big factor, as I think Grand Bois mentioned.
---My Schwinn Supersports have claw only, while my older or cheaper French bikes have the claw, plus an axle stop on the non-driveside.
---Then there's my Austrian Steyr Clubman, with claw only.
---Lastly, a couple of my Japanese bikes have an integral derailer hanger dropout, with a cast-in axle-stop in the driveside dropout only.