I have gone through a set of these, but it took about 6 months till they were broken out. Even then, they still had enough spikes to grip the ground. However, with the "scorpio" spikes, they just tear apart is a couple weeks, not even that. Although these are quite expensive, and you can get them cheaper from a local store that buys these by the boxful, its still worth the investment. It can make a bad shoe work like a good shoe, as im using FJ Greenjoys for 2 years, and ive playen over 30 hours a week, walking, a couple of times.