OUR 313 RKS came with Goodyear Marathons. Unfortunately they are made in China and are commonly called 'China bombs'. I will replace them before our spring trip although they look like new simply because I no longer trust them. Check on other forums for a great many tales of serious damage done by a blowout at speed. My suggestion is that your first criterion in choosing a replacement tire is to verify that they are not made in China. Also be advised that many folks are using LT tires to replace the ST original tires.