Just had 255 40 17 GY F1 GSD3s rear tyres fitted, they stated their guide for that particular tyre & size, recommends 33 PSI, but when I questioned this, they stated this is only advisory!? My previous BS RE010 was 40 PSI, but I know when you go wider, it normally means less PSI is required. Is 33 psi about right guys for those with GY 255s or any other 255 tyre brands? Cheers
