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Title: Not good luck with these
Review: I got these for my 20" wheeled lawnmower to help protect from the frequent flats I was getting from thorns and what ever else in my lawn. I still kept getting flats often but on close inspection I saw the flats were actually little slices in the tube and they were never on the bottom but always a bit to the side where the edge of mr tuffy was sitting. After numerous flats I noticed the little slice was always where mr. tuffy overlapped itself. I believe the hard edge of the liner was actually cutting into the tube. Maybe being used on the lawnmower was too tuff on them but they simply didn't work for my purpose. I swithced to the Pyramid thorn resistant tubes and had very good results with them.
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