Our Spyder, not concerned about having high mileage tires that last almost forever and are super low cost.
Will not run touring tires. Prefer high performance tires that trade better grip for reduced mileage expectations.
A Spyder, even fully loaded with two riders, and baggage is about 1/3 the weight of a car that runs similar tires.
Added weight of the car, provides increased grip. Granted the car distributes that weight upon four tires, but even so still has far more weight per tire than a Spyder.
My dad, and many others put weight in the back of a van or pickup truck during winter to improve grip.
Suppose, following published data, a car weighs 4000 pounds. So about 1000 pounds per tire. Granted, each tire sees a different weight, but you get the idea.
A loaded Spyder weighs about 1600 pounds. Or about 500 pounds per tire.
I know, pretty basic way to consider this, but does emphasize that reducing the weight on the tire by 50% will certainly reduce effective grip.
Softer, sticky performance tires for us.
Also, as I have stated for years, if you utilize tire comparison ratings, not the typical wear, temp, and grip ratings on the tires sidewall, but actual performance data comparing tires, you must compare like type tires. Meaning compare touring against touring, high performance against high performance. Do not expect highly rated touring tire to match a highly rated performance tire. There is a reason high performance cars run high performance tires and not touring tires. Increased grip is of greater importance than a tires short wear life.
Granted too, a very expensive touring tire may outperform a low cost performance tires, but similar priced tires will show the difference in performance.
Choose wisely.