A lot of you are looking for pneumatic tail wheels. Today, I found 5" pneumatic tires and tubes. These are used on all terrain scooters. After flying in Marti's KR2 with the solid type scooter tire and hearing how loud the wheel is on the ground, I would switch over to this pneumatic tire immediately. Wheel & Sprocket is the name of the store I was in that carries these. http://wheelandsprocket.com/site/page.cfm?PageID=12 <http://wheelandsprocket.com/site/page.cfm?PageID=12> Unfortunately, they are only located in Wisconsin. Maybe some of your local bike stores have something similar.
Mark Jones (N886MJ) Wales, WI