Many sizes of the Super Lug tires no longer appear in the current (2009) Carlisle catalog, and there is a post in the Vintage thread that indicates that the entire SL lineup will be discontinued. I guess I'll have to quickly get those ribbed 16-8.50 x 8 tires for the 80 cart right away instead of when I think I can afford them...just in case they disappear also.
Chuck
Chuck