Hey....I've got the 8" Doolys on my F5 Sno-Pro. 102 -1.450" studs......These carbides are great. No darting, and after tuning the suspension it's a point and shoot sled. Well worth the money. I got'em from Shadetree Powersports for a little over $100 for the pair about a month ago. They were on special, don't know if they still are or not.