Originally Posted by
old and new
The link says it's QUILL, which could be either 1" or 1 1/8" THREADED
It appears to be threadless, if you make sure of that in either case you're OK.
Quills extract stem an' all, using an exp. wedge screwed to the long center bolt.
Threadless has a stem grasping the the steerer. The on-line cat. I'd listed shows..
My link? Yeah, the Riv ones are 1" quill. The OPs are DEFINITELY threaded (aka quill), NOT threadless (aka Ahead-Set). Check out the lock nuts in his pics.