PS4 is only cheap in bukit kemuning, other places everywhere in malaysia is expensive.

I use 225/50r17 and been charge rm500 plus per piece. Some forumer here get 235/45r18 for the same price at bukit kemuning.

Next time I will go to bukit kemuning to change tyre. Ur is from jb, quite far, not sure worth it with fuel and toll to travel.

Maybe u can consider conti max contact 6 too as an alternative.Got positive review, price also not so keras like ps4.

That's normal price range.

Which model of Goodyear? How is the condition?

Hmm if Goodyear F1 and still 70% condition then it's ok to leave it at the back to pair with PS4. If it's just mid range Goodyear model like Assurance, maybe better to put the PS4 at the back just for better safety insurance. Because if you put PS4 at the front paired with only a mid range model of any other tires, then you might benefit from much sharper turn-in response but the back might feel a bit more nervous/more oversteer tendency.

The difference between 235/40 and 235/45 is huge, which is about 1.2cm sidewall height or 2.4cm overall outer diameter, so for A250 I don't recommend to use 235/45/18. If you want slightly bigger and taller sidewall for a bit more comfort, the max you can go is 245/40/18 which is only about 4mm taller sidewall or overall only 8mm bigger diameter.

For 245 width tires minimal 8jj rims. I think stock A250 rims is already 8jj wide right? So no need to change rims but if somehow your A250 is using narrower rims then cannot use 245 tires.