So last year I purchased the Adidas XC S 4. It came with a kind of spikes I had never seen before: not only were they 5/16 of an inch (that's right I measured), making them too long to use on a track but not long enough to get a proper grip on grass, they also had a weird shape. The thread on the spikes is shaped like a dull 6-pointed star that looks kind of like a cross between a gear and a star of David. I think you get the point but I can post pics of them or the wrench they came with if necessary. Now, it might seem like I got ripped off, but let me tell you these spikes are AMAZING. They haven't gotten dull even after a year of workouts and races and the star shaped thread means that they (nor the wrench) never get stripped and are easy to put on & take off. So my only question is, where can I get more of these? And preferably in more standard lengths like 1/4, 3/8 etc. I haven't been able to find them anywhere on or offline and I've never met anyone who has them or has even seen them before. Hopefully someone on this site has though.