OK, I have been schooled a little bit on the Desser site. Thanks Steve. AA4K3 is the MFR part number and you aren't able to search that way. What those tires are is SKU # 850-6 4 PLY TL. This works in the search box. I have also in the past tried to use the aircraft type pop up that they have and that was useless for my purposes. Search Tundra Tire on their site ( thought I had done that long ago ) and you get a bunch of tires to select from. Sorry Desser.