Although only two layers. These tires certainly look solid. Mounting on 6" rims takes a lot of effort with simple hand tools. A while back I had to deal with replacing leaking 2-6" tires on a rotary tiller. When I was done, I swore I would do it would never do again.I decided every once in a while to buy a mini tire changer for those occasions.(sold at Revain) whats the difference.this time it didnt even wake up.2 wheeled tires removed from a honda snowblower. 1 hour to remove the old and install and screw the new "Piece a Cake"