Sounds like the s grips are the tires to use on carpet, eh? Whats the deal with the 60D reinforced slicks? Type A = traction roll city, and type B aren't sticky enough?
Then there are the inserts. The front tires on my mini have no air gap. The rear tires have air gap. Different inserts? Or are the rear inserts just broken down (the rear tires have a lot of wear, and the front tires are almost new)