Careful... You're not getting all the information.
We are suppose to have a few sets of these coming shortly.. as an OEM they offered the pre-release to us. We will be running them on 2 different aircraft to see the wear.. but the tire looks very promising. As for the 27" or the 31" that are "coming" the 27 is for an 8" wheel and the 31 a 10" wheel... Not an issue if you want to purchase wheels as well...
Be patient.. there might be something else on the horizon as well... for the larger tires.. but the 850 smooth should prove to be very nice.