I have purchased other Stens parts in the past and have had good experiences with them. This time I decided to try their garden tractor tires. I installed both tires myself without any special tools. So I made an effort to break the bead and put the first tire on the rim first. But after I replaced the first, the second didn't last long. A week has passed and the new tires are still holding the air. My old tires lasted over 12 years. Time will tell how long this new set will last.