Boy, in my younger days I have many a memory of all of those tires, but as I, and technology, have aged, (I am sure going to jinx myself here and prolly should not be saying this), even though I am a real fanatic when it comes to checking / maintaining tire pressures, adding a pound or two here or there depending if wet, dry, sand, snow, weight etc. I literally cannot remember the last time I have had an emergency flat tire? I do not recall any of our current spare tires on our various vehicles having ever touched the ground??
Bill
Same, it's been at least 10 years since I've had a flat and probably closer to 20 since I've had a blow out. I have probably been taking better care of my tires, but it could also be better tire technology.
All the ones I have seen have been a tire and wheel combination, hence the name "tweel" - tire/wheel.
I don't think these are going to be marketed to the average Slingshot owner
You should get into the market early and get some Tweel's for slingshots ready! 
