I was concerned whether this would fit my 75 lb. Camp Chef 24" smoker because the width with the legs on was 29.5". The only measurement provided in the product description was an outside dimension of 31.5" and I could not find what the width was inside the rails. I took a chance that the rails would not be more than an inch thick and ordered it. To my relief, the cart easily expanded to the width I needed and could actually go beyond that (not sure how far). Now I can easily move my smoker around. One note about the lockable wheels, I could not lock them with my hands, but no problem using my foot. However, I was unable to unlock them with my foot and had to use a hammer to release them.