Pardon my ignorance but here is my question: Why would a Shadow need an ST tire to begin with?
Anyone needing a sticky, low mileage tire and knee pucks should be on a crotch rocket or ST model. I have laid my all my Shadows way over with 880s that go 24K and never had an issue with traction or slippage - admittedly, I don't try that in the rain tho' cuz the rubber has to be un-sticky to get those kind of miles.
Finally, I am mystified as to why you would run a stickier tire which might not be rated for your bike's load, then grouse about the low miles.....you only get 6K.....really? If you have that kind of money and are otherwise happy, why bother to post a question? But then again, I am a dumb ass.