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It's because of the extra forces and weight on the left side when you ride with your left hand on your hip.... taken from the "gixder forums".... 🤪

You're talking more about the fact it's squaring off? I haven't noticed any significant difference over past tires I've ran. They all get flat in the middle. I don't get to commute to work on US 129. As the flat becomes more pronounced with wear I can eventually tell tip in isn't as smooth as a fresh tire, but that doesn't keep me from taking it down to the wear bars. Or maybe a little farther... 😁 As for that little curled lip on the trailing edge of the siping, I think that has to due with the nature of the tread pattern and forces from acceleration. Those side treads are more perpendicular and are taking forces broadside on the trailing edge. I've burned through numerous sets of Bridgestones that had a very similar tread pattern and I'm on the last one on the 2nd VFR. That also exhibits the trailing edge curl.

Some eye candy encouragement for potential buyers... 8th gen set on my supercharged 6th gen...

I'd look at the physical stuff first, starting with chain/sprockets, before moving into the standard air/fuel/spark.

I feel like discussing preferred tire pressures is in the same categories as chain lube and engine oil. All of which I have no real interest in debating. I will say that is a nice video, but my VFR saw widely changing conditions throughout the trip. From drastically different bike weight loads to temperatures from high 30's to 105. Fiddling with tire pressure testing on a road trip is not my idea of a good time. I keep my maintenance concerns as simple as possible on the road so I can enjoy the ride. Maintain good chain slack and relative cleanliness and make sure tires are staying properly inflated. I want good tread life and 36/42 has served me well. If you want to try 33/36 in a set of KM1s you are more than welcome to. I'm merely pointing out here that there's a set of cheap tires that work. Money saved spent elsewhere on fuel, beer and good food. YMMV. 😊

Mileage/longevity vs. grip...always the same. I run 36/42.

Yup. This is 8,000 miles. Squaring off on the rear is evident now but there's still a ton of meat left. Looks like maybe 1/8th inch material above wear bars in the middle. I could easily do another run across country on this set. The return trip might be pushing it.