They are king springs in the front.

Thats interesting that the medium 48s only suit heavier cars, they are, I believe, the new control tyre for Aussie Race Cars (wolki101 can confirm) which are far from heavy.

Its settled then, 32Rs on the front, 48s on the back.
No arguements for 32Rs say on the left hand side as there's only I think two left hand turns on the track...?

edit: yes whitesedan it is the 120y