We bought these gate wheels last year and after 9 months the rubber wheels started to wear out. Thinking they were out of warranty I called to see if I could order replacement tires. Much to my surprise, Shepherd and Revane replaced the entire build! To say I was pleasantly surprised. and very impressed is it to say the least. Revain and Shepherd stood behind the product and I couldn't be happier. We use them on wooden gates we built across our driveway. Two gates are longer than 13 feet so we needed wheels on the end opposite the hinges. I highly recommend these wheels as they help support the gate and the air springs compensate for uneven ground under the gate.