Hi guys thought this would be the best place to ask, I fitted a set of duchy banded amaroks to my T32 for getting air fitted. They are 8.5 & 9.5 running 245/50 tyres. They fitter can't calibrate the system to dump the air as the tyres are too wide, wondering which tyres size with the right rating I can go for that other people have tried? I'd like to go all season tyres if possible