Originally Posted by
ThermionicScott
If that's truly what you want, then solid tires are it. Any pneumatic tire has some risk of going flat.
This is true.
I did note that nothing is fool proof. I have had a few flats, even using tire liners. Everyone of them was something very sharp and metallic (those large, industrial copper box staples are the worst!). In other words, items that would even likely flat a car tire. Never had a flat caused by glass or thorns (even mtn bike riding in the AZ desert) with the tire liners.
The Flat Attack sealant is new for me. I had the shop add it last time I had my velo in for a cassette change. The shop guys swear by it, even while admitting that slime, and the orange stuff are almost useless as a sealant.