Originally Posted by
Nullius
I don't think that most (or any) spacers are splined anyway, but uniglide splines are the same as hyperglide, it's just the lock-ring that's different. On uniglide the smallest ring <i>is<i> the lockring, which may look kind of silly, but will work fine. If you don't like it, you could just switch out the free-hub body to hyperglide from a trashed wheel.
Lastly, some freehub bodies were both uniglide and hyperglide compatible, check to see if yours is, and you might be able to use a regular lockring.
this part is wrong. uniglide and hyperglide have different splines.
Hyperglide cogs have one wide spline and will not fit on a uniglide freehub unless you file down the spline.
(uniglide cogs will fit on w hyperglide bidy though)
you can use most spacers (or some PVC pipe) and yes, you'll need to use the small cog as the lockring.