Originally Posted by fietsbob

the Quill stem raiser I linked to has center bolt that you tighten up the wedge at the bottom,

then the hex Head of that bolt is internally threaded, and the top cap bolt that compresses the loosened threadless stem,
and the spacers beneath that stem and pushes down on the top race of the headset setting it's preload, (standard threadless fork~headset practices)

no star nut needed.. it's the special design of that Bolt that does that.

then You tighten the threadless stem Bolts around what is Probably a Shim from 9/8" to 1" .. the BHP 20 as shown has its own stack of Shims

To go down to the 7/8" of the Quill that is the size inside of your Fork ..


I own the next larger one, the BHP21, I use it with my Threadless fork Bike that I got with too Short a Steerer tube cut.

Ive been using that bike for 6 years since..


there is another Kludge, but I dont have time right now to write it Out.