Had them on my 02 Yamaha Grizzly 660. They have 2 lug patterns on the hubs. Stabilized bars on the front with homemade brackets, none on the rear. All the bearings and sprockets are good, one track needs the bottom tube welded, see pics.. I didn't even know it was broke till I took them off the machine.. They are a lot of fun, go anywhere! Except cattails, don't go over cattails.. Located near Upham, text me with any questions.