If you have a fork steerer inside diameter of 0.833 " [or .020 larger than 13/16"]
It is is the smallest stem type.

A possible kludge , get a tube type quill stem raiser, they are a 2 stepped tube,
the smaller end goes in the fork,
and there is a quill wedge to tighten it into the fork..

the inside diameter of the upper portion, is the same as the outside diameter
of the lower part.

these are made to put the original stem into, and have it higher up,,
they are made in the common sizes
,833",.. (.874")7/8"-.22.2mm,.. 1"(9/8"od) current mtb size..
If you still want to fit an adjustable stem on, ...

a shim between the top OD of the tube riser you installed,
and the 28.6mm, 9/8" 1.125" that it needs to be
to clamp on a threadless stem of the adjustable type is possible..


wouldnt do tricks or aggressive riding with this combo,
But for JRA, it will do the job..