I haven't tried it on ST, but I have gotten 15k-miles from Shinko Raven 009 on my VFR. Also 16k-miles from Bridgestone BT45s on my commuter. Going on 10k-miles now with rear Kenda KM-1 on my Valkyrie, probably get to 13-14k-miles.
Some VFRs have gotten to 17k-miles on KM-1s and still going. One of my friends with Goldwing got 18k-miles from Michelin Commander II.
Trick to maximising tyre life is to not over-inflate them. Current suggested max-inflation pressures are for GVWR (fully loaded w/passenger = 1118lbs) AND traveling at top-speed rating of
tyre itself for minimum of 1-hour (w=168mph). Which is way, way more stress than any of us can do just cruising down freeway. Also very risky with lower traction for braking & cornering with such tiny contact patches.
I remember back when owner's manual would give optimum tyre pressures for performance and wear. Then some conflicts occurred with tyre makers and now they're all suggesting max-inflation pressures for everything! Same 36/42 on small CB or R3 as for VFR? Ridiculous!
When I first started tracking my VFR, I was still using "max-inflation" and got just one day out of Dunlop Q2 tyres. Having learned from set-up guru Dave Moss, I lowered pressures and got 3-days from set of Q3+. That's 3x the mileage from softer tyres too! Now I use 33F/31R for street and 31/28 for track on most tyres. Pirellis get even lower 29/23 on track.
https://www.reddit.com/r/SVRiders/comments/6fw939