Tire pressure recommendations - Battlax S21R's

i found this, i've got 200 miles on S21s over two days, 60-70 degree days...i ran them a couple psi lower that is on this list...i will use the suggested psi next time out.
these are decent tires especially at Int pace, IMO

good luck

 

that tire wear isn't that bad i run mine 30/30 normally for coaching and rain on my zx6r

 

I think a helpful suggestion is to divide the issues into suspension vs temperature/pressure issues.
Is the wear in a consistent continuous band all the way around the tire? or is it irregular?

 

Hey, mine looked more torn up than urs when I ran them at Barber on Memorial day weekend, that track inspectors had set the front at 31psi. And the rear at 29psi. It was my first time to run a track. It was hot that day about 96 degrees and I ran 4 20 min. Sessions. I am trying to upload a pic of the tire ? That was taken at the end of the day, I was riding a 2017 cbr1000rr, I am thinking this kind of where in normal for track riding ?

 

I think for the most part it is the whole tire, thinking some of the tire wear more when cornering but that makes since to me, more friction more wear !

 

For the OP, I'll give it a try reading your tire...
I'm not an expert, but what I see is that most of the roughness on the side of the tire is debris kicked up when you get on the throttle more on the fat part of the tire. See that area that kinda forms a triangle of no debris in front of each tread (red triangle), that results from coasting through the turns off gas. The edge of the debris field marked by the blue like is likely where you are finally coming on throttle. The faster you get, the earlier you get on maintenance throttle, the lower that transition from shiny coasting wear to grey wear gets to the edge of the tire. Hard to see definitely where the shiny transition is but I'm assuming it's about where the debris field starts.
As you get on the gas on the fat part of the tire and heat up the tire you get that orange peel look (black oval). It looks OK to me.
Another way to see where you are getting on the throttle is to feel the leading edge of each tread. See where it is worn most usually on the lateral side of the tire. follow it toward the center and the wear will disappear and flatten. The trailing edge will have build up where you are coasting laterally on the tire and then start to wear where you are on the gas up higher. If the wear is excessive on the leading edge, I understand it that the rebound is too fast.
Take a look at your vids and see if that jives with what I say. Are you coasting through the turns then getting on the gas well past the apex? Remember also that how you take a turn depends on the track layout. So, trailing into T7 right before pit out is good. Trailing too much in say....T6 leaves you slow on the gas onto the back straight. (You can't really trail into T9 right before the front straight because T8 is slow)

 

did you measure tires pressures cold and/or hot off track? no warmers i presume.

 

when i say coast, i dont mean you're necessarily going slow. if you are pushing the front to the point of sliding on corner entry, you might be hauling. but the front wheel is doing all the work and the back is "coasting". it's not until you get on the gas that the rear starts to "work" and the wear pattern changes.
Do you tend to catch up to people going into corners maybe more so than power past people on the straight? different corners lend themselves to different styles. but dont limit yourself to one style of cornering.
keep in mind, i could be completely FOS. my observations have to correlate to what you feel on track.

if your front feels squishy? you might need more psi in the front. i am not familiar with the BS, but the pirelli supercorsa tires have a very soft carcass and the front I feel does better mid 30's.

check them hot as soon as you roll to your pit.