Thank you, thank you, thank you. I just changed my stock MT21 for a Maxxis 6006. I haven't changed a motorcycle tire in 30 years. Not that I want to change tires all the time, just that I wanted to be sure I could at my age! The biggest bitch was removing the second bead of the old tire. It just took some time. When I tried to remove one tire iron to move it to a new spot, the tire wanted to roll back on the rim. I ended up using just plain water as a lube. It seemed to make the process go a lot easier. One question I have. The SXC did not come with a nut to hold the valve stem in place on the rim so it was a pain to get the air chuck on the valve without it wanting to praire dog and go back in the rim. I found an old nut off my IT175 and put it on to help in inflating the tube. Should I leave the nut on or is there a reson there is no nut on the valve stem?