That was ll sort of tongue in cheek.
There is a ton of GREAT information on tires on here with several brands and sizes that will work on your spyder listed.
There is information explaining all of the info on the side of the tire and the most important part of that information is when was the tire manufactured.
Then you will find several discussions on tire pressures and some of them can get rather heated at times.
I will tell you this, the factory or stock tires on your spyder will require a lot more air pressure to keep them safe than a car tire will. The reason being is the sidewall of the stock tire is only 2 ply and therefor very soft requiring a lot more air pressure to keep the spider riding on it as it should. The car tire is normally about a 4 ply sidewall allowing you to run less air pressure to keep the spyder riding the way it should.
I followed Bluenight, Igetaround, and Peter Aawen sugestion of 18 PSI in the rear and 15 PSI in the front with the car tires I have. Spyder handles great and the wet traction is awesome.
I did have to run a little more pressure when riding two up, fully loaded, towing a fully loaded trailer just to stay in the 4 PSI rule. If you are unfamiliar with that rule, it basically is that check your tire pressure cold, ride for about 30 min for the tire to warm up, if the pressure increases more than 4 PSI over what it was cold, you should add more air to it. The bigger increase in tire pressure over the 4 PSI means your tire is creating too much heat because of being too low on pressure.
Hope this helps.