I had a tire that was leaking too. I filled it with air, and submerged the tire in my pool and you could see the air bubble coming through the cracks. I spent $28 on a tire tube from an ATV / Lawn Mower shop. Took me all of 10 minutes to install the tube. Trax are like new. I filled the tire and haven't touched it, including adding more air. I'm on my second year.