As we all know that different engines have come with different diff ratios to get the best driving results. ie 11:41  11:43  11:45  9:37  8:43 and 8:41. Having said this, i just want to know as if someone gets the required diff ratio for any specific purpose matching with any engine, how bigger a tyre can the stock axle support for day to day highway driving? Like if we have a 1.3 with the diff ratio of 5.375 or 5.125, can we use 30" or 31" tyres for highway driving without putting any negative effect/ load on the axles?