Bruce from O''''Fallon IL on 6/5/2009 4:48:57 PM:
I recommend Slime to avoid that type of flat or at least Kevlar tires. I use Slime in my MTB tires all the time and never, ever get a flat. Haven't had a MTB tire flat in 30 years and I've had tons of thorns in my tires and have ridden on some seriously nasty terrain in various parts of the USA. So, for rides like the KT, the stuff is great. I once rode the Katy with a guy who had no Slime and he got so many flats, he ran out of patches. I gave him my spare pre-Slimed 2.5" tube and he went the rest of the trail w/o flats. I knew I wouldn't need it anyway. Peace of mind.