I have recently bought a 96 pathfinder. i want to change my factory 235\70-15 tires to some dunlop mud rovers 30x9.5. some people have told me that in changeing my tires i will incounter problems ( bad mph readings , front end damage , etc. ) is this true ? or can i change my tires with no worries? what should i do i really like the tire and want them on my truck!