The Tbird I currently own,also came from the factory with ZR tires,just like the CTX does.The "R" means radial,and the "Z" means, speeds up to and beyond 168 MPH, which I just know we'll all drive at,lol,especially since the CTX,like the Bird and many other models,will not even come close to.
Now looking at the picture of the CTX,the tires look to be Bridgestones.I ran a set of those on my Bird and got a warping 8000 miles out of the front and 5000 miles out of the rear,which was totally unacceptable!And unless I miss my guess,that's what the CTX will get for tire mileage to

f course,the Bird is also about 70 lbs. heavier.But the point is,the CTX,like the Bird,is NOT capable of those speeds,nor is it made for the purpose of goin around corners at warp speed.In other words,unless your machine is capable of those speeds,and or you plan to go around sharp turns at those speeds,you don't need these tires.But unfortunately that's what the MC manufacturers all seem to be using these days.
Now I went thru 20 tires,yes I said 20,[$2000 just for the tires which I bought on line cheaper then what the stealer gets,plus I do my own work] over a three year period and 60,000 miles before I finally found a pair that are giving me the best of both worlds.And it was only recently,again trial and error,that I found these tires that I'm now using and getting decent,not great,but way better mileage out of than all the other ZR tires on the market.And I think I've tried em all.And those tires are the Avon Cobra 130/70ZR/19 front [the Honda uses an 18 inch but is also available in the 130/70ZR/18 size],and a Dunlop American Elite 200/55VR/17,[the "V" means speeds up to 149 mph] the same size as the CTX uses,on the rear.[the 55 series works just as good as the 50 series tire which is what actually comes on the rear of the CTX and Triumph's Tbird.
Anyways,these are the growing pains that you guys are about to go thru.But, it's not just the Honda and Triumph,it's all the motorcycle manufacturers that are using these ZR tires and the customers all have the same complaint,SHORT TIRE LIFE,which WILL get expensive if you drive any kind of mileage like I do.So there's something else to think about.Questions??? Dave!!!