Originally Posted by dabac
Stan's dry out, and has to be topped up regularly. And doesn't do that well on skinny tire pressures.
I use to live in the Mojave Desert region of Southern California where goatheads bred faster than mosquitos in Louisiana in the summer! Goatheads I found out would penetrate almost anything even a combination of a Conti Gatorskin with a Mr Tuffy liner and a Slime tube, and what I found out is that Slime would not seal a leak unless the psi was below 70, and from what I heard at a local LBS none of the other sealants at the time would either.
The best tire I found at the time was the Specialized Armadillo All Condition tire, once I started using those tires I never had another flat in 15,000 miles...except once when I ran a rear tire down to the cords just to see what would happen.
Today there is a new liner on the market that beats Mr Tuffy hands down, it's called a Panaracer FlatAway. The FlatAway liner is so tough I actually tried to drive a tack through it and failed whereas with a piece of Mr Tuffy it went easily through; the FlatAway is so tough that it hurt my hands to try to cut it with scissors whereas the Mr Tuffy cut like butter. There are 2 downfalls to the FlatAway liner, one is it cost about $15 per tire, and the second is that you can't transfer from tire to tire because it has a self adhesive side that you peel and stick to the inside of the tire and that adhesiveness will not allow it to be transferred. The good news about the liner having the self adhesive is that you don't have to fight with the liner to keep in place while you attempt to install the tube then the tire which is a real pain and a guessing game with the Mr Tuffy. Also the FlatAway liner weighs just 25 grams vs 98 grams the Mr Tuffy weighs although Mr Tuffy has introduced lately a lighter version that weighs 57 grams but that just means it'll be less effective.
Today I no longer live in Goathead country and my streets aren't real trashy so I don't bother with using the Specialized Armadillo anymore, but I do use a FlatAway liner in just the rear tire of most of my bikes only because that's where most of the flats occur, but I also use tires that highly rated against flats just not as high as the Armadillo. The new Armadillo All Condition tire is about 30% lighter than the version I use to use.