I just got the portable tire changer from harbor freight and used it change the tires on my kids 250ex and was really suprised how well it worked. I was going to make my own then decided for $60 I would try it. I was a bit concerned when I ordered it that it would show up and end up being a flimsy pos, not the case at all. The bead breaker worked very well and the changer made getting the tires off the wheel a breeze. Don't get me wrong changing atv tires is still work even with the changer but it makes it alot easier. You have to bolt it to the floor to get the best results. Just thought I would post my opinion in case anyone else was looking at one. I know in my area its getting hard to find any place to change atv tires. Wal mart used to do it for $5 but they refuse to do it unless you buy one of their tires, tire shops all tell me the wheels are too small for their machine and the quad dealers all want regular hourly service rates ($50-$60/ hr).