If you're looking for tubeless 20s, you're more likely to find Dubs than Budds! (Dubs are the chrome things the kids use to dress up their Eldorados). Any tubeless truck wheel will be in half inch sizes, 16.5", 17.5", 19.5", 22.5", and 24.5". The tubeless replacement for a tube type 20" is a tubeless 22.5". Grigg might have guidance on sources, but to me you'd do well spending time on Craigs List. They seem to show up there every so often. Stu
