Originally Posted by
sknhgy
I once tried Mr. Tuffys on 26" mtb tires. Even with careful installation the liners wore and caused bulges on the tread. Granted, I put them into low-priced Kenda tires. But after trying various things I am sold on reinforced tires like the Marathon Pluses that I have on my hybrid or the Conti Gatorskins that I have on the road bike. They cost a bit more but they sure do last a long time, and I rarely have to fix flats. The only time I would use liners would be if I was constantly exposing my tires to sand burrs (goatheads).
Therein is the reason I use them.
Goat heads (different from
sand burrs around here) are every where in Colorado. Mr. Tuffy ...and a modicum of knowledge on how to avoid the goathead fields...goes a long ways towards not having to fix flats
all the time.
Case in point, I took 3 other people (8 tires total) down to see the dinosaur tracks in the Picketwire Canyon area one fall. We had 27 flats. One person...whose avoidance knowledge was zero...managed to get 20 goatheads caused flats. The other 7 flats were distributed between the remaining 3 bikes (6 tires). One bike had tubeless tires and he picked up 6 flats. One bike had Mr. Tuffys in one tire only...sorry Dear

...and it got the last flat in the non-Tuffy equipped tire.
My Mr Tuffy equipped bike was the only one of the 4 that made it out of the canyon with full tire
s. To be honest, I did end up with a flat the next day...it's impossible to miss all of the damned things

But they worked for me and they worked better than the tubeless tire.
Pressure? I run 40 psi on the rear tire of my mountain bike. I seldom have abrasion issues.