I posted a few months ago to see if anyone was interested and many of you were. So, I now have a supply of replacement wheels that fit Seitech, OptiParts, Intensity Sails, etc. Actually, they'll fit any dolly with a 1 inch axle. Also great if you're interested in building your own dolly. Price is $36 each or a pair for $70. This includes the entire wheel kit - rim, tire and bearing assembly. There are more details and you can order online on my webpage: www.boatwheelz.com Feel free to send me a note here, too..