Well, the only prototype Subrosa stuff I saw were the stem and the grips, and seeing that new grips are a dime a dozen these days, I figured we should check out the stem:


Or not. Hm. A milled-out, split-cap frontload stem. Where have I seen that before? It's more or less the skeleton of a Shadow stem. And here I thought toploads were making a comeback. This is what happens when 4-foot-11 12-year-old kids (or 25-year-old adults) insist on running eight-plus inch rise bars, I suppose. Not that I expected Subrosa to re-invent the, um, stem.
That said, let's see some thinking outside the box! How about a pair of 17-inch rise two-piece bars and a stem that goes in between the fork crown and the lower bearing race? Sure, you'll need some sort of extra piece to hold your forks on, and you won't be able to do barspins or tailwhips anymore, but won't that be a relief more than anything else?
That, or everyone could chill on buying super-high rise bars unless they really need them so there'd be no need for stems like this—but what am I talking about? That would just be crazy.