The car in the photos is Darrell Zipper's K gas lakester that he ran several times probably 5-6 years ago. It had a 440 snowmobile engine in it and I don't think that it ever ran over 120. I happen to be in the inspection area when Darrell was discussing the use of motorcycle tires with the SCTA inspectors. The reasoning went something like this: The tires are rated for 165 mph, their load rating exceeded the corner weights of the car by a pretty large factor, and the class record at the time was about 150 mph.
If you look at say the Pirelli GP motorcycle tires they are speed rated at 165 mph and that could certainly probably be moved up by shaving the tires. Before the new motorcycle tire rule change came out several years ago that the faster "sit on" bikes, ie turbo Hyabusas etc, must run on Bonneville speed rated tires most of them ran on the GP style Pirelli, Dunlop, Michlen tires and there were many runs over 250 mph. If you looked at the lead blocks strapped to the swingarms of these bikes and add the riders weight into it I would bet that the tires were carrying 300+ lbs loads.
Regarding the Goodyear 17 inch dragster front tire, I think that the small section tire is limited to 200 mph max speed but I have never heard what the Bonneville/SCTA speed rating is on the new dragster front tire that is somewhat wider. The problem, as I understand with the small dragster front is that at about 275 mph the tire will not stay on the bead, and there have been incidences of this happening which lead to the 200 mph speed limit.
Rex