sport touring tyre, no confidence to lean more

tyre also feel more 'square'-ish compared to S21

my tire mileage about 5000km only, dont see any squaring so far

gt2 is supposedly the upgraded version so yeah should be better

if you say so, I need to regain my confidence to lean though.. now scared already 

Buggered my bike going downhill from Genting once before learning my lesson:

You can only go 70%-80% max on public roads because these are not controlled environments. Something is just bound to surprise you when you least expect it. Konar cun-cun ala Valentino Rossi, textbook knee-down... sekali tiba2 monyet melintas pulak... dusyummmm.... eNtah siAPa yANg saLaHhh ku tAK taHUuuuu....

Anything above 70%-80% should be done on the racetrack.

Sekarang dah tua, dah takde lagi dah asah-asah konar ni.... I ride to live, coz already got way too many other ways to die once past 50...

you use what tyres now?

the GT/GT2 is cheaper on shopee now, there must be a reason the ST is more expensive, or just slightly, and I think the ST is more sporty than the GT

I got a set of Rosso2 the other day, about the same price of GT2 available but I wanted something that gives lesser mileage... I prefer sticky tyres than those high mileage boring wooden blocks

Zeneos I recall, loses grip after half its tread, not sure if you experienced the same thing

your bike only goes up to 100kph? or that's just what the speedometer shows 

GT came with dual compound, and you're probably right about the higher load bearing thing, ST have limited rear sizes, 160, 180 and 190/50, many older Pirelli models moved to China, and bias ones for Rosso III moved to Indonesia
bias ply tyres need to go 1 size down for the same rim width because of the construction, so you would probably need a 150

Zeneos peeling probably wouldn't hurt the performance, it's probably caused by being too long in service, maybe more than 2 years I'd guess... but it's unusual
my Maxxis kapcai had compound boundary (soft side hard center) separation crack after 10 years in service

30k mileage tyre for me is unheard of, haha... I couldn't wait to change after 5k km each time.