It did wear pretty evenly with the reduced air pressure. Ran 18-20 psi.
It certainly looks to have worn pretty evenly, so anything better than that (for you, your riding, your usual conditions etc...

) would likely be at a fairly significant cost in terms of the time & effort involved in meticulously adjusting your tire pressures to suit the given conditions on any given ride.... and that rapidly becomes an ever increasing task for ever decreasing real returns! :shocked: Or the better milage/tire life from a tire with better tread wear numbers would likely come at a significant cost in terms of traction & braking, which probably isn't something you'd really appreciate!
Personally, I'd still think it likely that running 18-20 psi in a replacement Kumho is probably juuust a little too high of a pressure, but is there any discernable or measurable difference in the remaining tread depth between the middle of the tread & the edgeson that one?? As that Kumho has worn, did you notice any fall off in traction &/or braking, especially in the wet?? :dontknow: If there
is a little less tread in the middle than on the edges; or if you
did notice a reduction in wet road traction/braking, then maybe you could drop the pressure another 1-2 psi or so in any replacement Kumho & keep a close eye on it; but if not &/or you're not comfortable with doing that, then achieving a similar 29,000 miles from the single drive wheel on any machine, let alone a Spyder, certainly isn't to be sneezed at!! :lecturef_smilie: For me, that same milage would've needed
more than 7 replacement Kendas going by the
best milage I've achieved on them! :shocked: