I have just bought a new tyre for my jockey wheel. The last one, made in China, lasted just less than 2 years, before the cracks around it made it look ready to collapse. I tried a couple of tyre fitters to see if they had better alteratives, but they did not.I don't want to use a solid wheel as I find that the mover operates more easily with the pneumatic tyre. Does anyone know of any way of helping to extend the life of the tyres, or is the only way to keep them protected from direct sunlight?