We have tire slip all the time on the Savage and don't really realize it. Grabbing throttle while inside a turn gets you some rear end "squiggle" but only the folks following close behind you can actually see the tire slip a bit.
Harder tires slip more, especially when braking hard in the wet or downshifting hard in the wet.
Unless you have a dial caliper and can measure your wear to the thou or so you really can't expect any predictive accuracy out of that spreadsheet math. Data by the 1/32 is far too crude for the math to work accurately.
And even when you got good measurement numbers what it winds up telling you is you do stupid things to your tires to partially destroy them, run them at low pressure, go to the mountains and tear off .010" over 2-3 days, stuff like that.
Then the spreadsheet runs that change data forward and you say "Oh my goodness, to get maximum mileage out of a tire I have to ride like a granny all the time and take perfect care of the tires".
But one thing becomes clear, the Metzler 880 H series may yield the best overall mileage out of a motorcycle tire, but the cheap tires like the Shinko can yield a very similar COST PER MILE RIDDEN compared to a very high mileage tire like the Metzler 880 H. They just cost that much less.
Last thing,
what you pay to get the tire put on weighs to be more important than your riding style -- you get fleeced getting the tire mounted and balanced and you have lost before you even get started in one of these total cost of ownership/mileage contests.
And no, I ain't a gonna to win this one -- the hard rubber VW car tires I used originally wore much better than the MiniCooper/TR6 tires which are all that I can find locally in 165r15 now-a-days.
Next tire I put on will be a Metzler ME880 H series motorcycle tire bought on sale.
(assuming I live that long that is)
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