Smiffy3012

Thank you Blanco that information is appreciated

Good morning all. I wish to purchase 4 new Goodyear Wrangler Duratrac 255/55/18 tyres but it apears the only size available for my wheels is 255/65R18. I realise that this will throw speedo out slightly, but as I live on a farm having extra grip whilst on frosty and muddy fields would be an advantage. The car has only covered 71,000 miles from new so is not abused and is fully serviced. Can anyone offer any advice? I've heard people have remaps etc but is this strictly necessary? Thanks in advance Smiffy