I went to rotate the tires on my wife's 91 Range Rover. I noticed her factory owners manual said to not rotate tires front to back, but only side to side. I thought that was strange so I consulted my Hanes manual -- and you guessed it -- they say only rotate the tires front to back and never side to side. What gives? I've always assumed that you want to rotate the tires so they spend time at all four wheels. Any ideas?