Mike, Ray, et all. I used Mike's designs and modified them to get a cart strong enough, I hope, for the Bowron Lake portages. It has to carry my Georgian Bay stripper and 8 days worth of gear. The wheels came from Northern Tool & Equipment http://www.northerntool.com/ I wanted them large enough for the mud an easy rolling and small enough to stow inside. They are 12.5" X 2.25 with ball bearings, they fit a 1/2" axle and weigh only 2# each. At $5.99 each they are hard to beat. I used hard wood for the struts as I backed over my first model that used plywood struts and they broke at the axle. This cart could be constructed lighter but I needed it to be tough. I return from my trip on 9/16, I'll let you all know whether it held up. Thanks again Mike for your help.