I don't even like 20's except for duning LOL. I like 18's. Some are bigger(18 in Kenda Klaws, for example, were almost a small 20- currently running 18 turf tamers for mx and supermoto) than others, but I roll 18's for everything but duning. I just don't like big tires as they IMO hurt performance to much, depending on where and what terrain you're riding. The only thing I would even consider running a 22 tire for is a super muddy XC race(or maybe a desert race, but we don't have those around here). If they were free, I still wouldn't want them cuz I don't ride in mud anymore. A muddy mx track is the only mud I've rode in a long time. If you get them, you'll prob have to change your gearing. You might wanna factor that into the price as well to see if they are worth buying.