Cheers man, interested to hear, cause prob very applicable to me as I have to use road legal tyres (though some Tarmac rally tyres are legal which i use) Similarly to you Tim, I start 26front and 28rear and that'll lift to 36-34 after first practice (few minutes after sitting) and then set to 28-30 and left at that for the rest of the day Will take more care to check throughout the day next event. Have to buy a tyre temp probe thing. Phil