Well, I got 4-11.00 16 Michelin XL's and I have a few questions. I am sure most will say, new tubes & flaps SOP. Any one used the old ones? Any one totaly against using the old ones? Should I just ask the tire shop for a source for new tubes? Are tubes with the metal valve stems tough to find? Just wondering what all I am getting in to. The old tires were 9.00-16's, 11.00-16's are not that much bigger. Too much more expansion to use the old tubes? Thanks in advance for the help!