http://www.hpiracing.com/hpitires/touring/
That is the link for the tire ranges. And in case people do not like gluing their own tires, HPI sells them pre-mounted as well. However the choice of rims are sub-par.
But to make gluing tires easier, you can buy very inexpensive tools like this from Amainhobbies.com:
http://www.amainhobbies.com/product_...uring-Car-Mini
I've used such a tool way way back and it works very well. You put the mounted tire and wheel into the contraption, and then put the top part on the tire. From there, press down and the top part will open up the tire's seams and you dab your glue on the tire from there. Lift the top part off, and the tire goes right into place evenly and securely. I just can't find this thing in stock at any local hobby store.
As far as a spec chassis, I was thinking more in lines of if people want to stay in the class permanently and an expert class is made for RCGT that includes balls to the walls settings on their ESC and motor. But whatever, valid points are made for people that want to progress into the TC arena.