have you checked to see if there is a valve body upgrade available for it?? in the US there was an electronic repgrogramming from infinity available, there is a TSB out there somewhere for it
the RE5R05As respond very well to this upgrade
I have 2 x 18" tyres
i THINK they are 235x45x18
i dont remember the brand, they might have around 50% rubber left on them.
collect from Eastwood in NSW only.
if they arent gone this weekend, im gonna ditch em