treadwear ratings tell you a lot . The higher the number , the longer it will last , the harder the compound. The lower the number , the softer the compound. It wont last as long , but it will stick to the ground better . Hence the 100 treadwear rating on a nitto 555R . The highest rating out there is a 770 , and its on a vogue tire. Next is the 700 on a Toyo. It all depends on what you want ,traction or life . Find something like a 400 and you should be o.k if you're looking for both