At which depth do you guys replace tyres ? Front Nearside is 5.1mm Front offside is 5.5mm Rear nearside is 7.5mm ( this tyre was fitted a month ago ) Rear offside is 6mm I know they don't need doing yet but I would like to know what you guys think ? Thanks   What about rotating tyres, is this mainly to get the most out of them or is it mainly for saving pennies by not having to replace them as often ?