I got over 22,000 on my first belt. A friend of mine had his break at a little less than 2,000 miles over due and he was around 230 miles from home. I just had bigbird put in Dr. Pulley sliders at 33,000 and although it only had 11,000 on the belt, I felt better to go ahead and change it at the same time we had every thing apart. Like JeffR_ said you can take the chance to run longer with it but it's not worth it to me.