I just did a Google search on Mountain board wheels and the possibilities for you tail draggers are endless in pneumatic. Beautiful anodized aluminum wheels as well. Maybe this will help...
Mountain board wheel images: http://www.google.com/search?q=mountain+board+wheels&tbm=isch&tbo=u&source=univ&sa=X&ei=468cUpZMx9rIAaSKgegH&sqi=2&ved=0CF0QsAQ&biw=1280&bih=643 Mountain board wheels: http://shop.mbs.com/accessories-10/mountainboard-wheels.html Tires, tubes, bearings, wheels: http://shop.mbs.com/accessories-10.html Mark Jones (N886MJ) Stevens Point, WI E-mail: flykr2s at charter.net Web: www.flykr2s.com