True to historic performance, I�ve used Continental tires for training / racing throughout my career. I�ve used others, but keep coming to back to Continental for its durability, speed, and overall quality.
This is an awesome road tire - almost unbeatably low rolling resistance, and pretty decent puncture resistance with a good sealer (Orange or Silca). Just don't buy them at full boat price, as over $100 for a bike tire is pretty insane. Wait for a sale for under $90, and preferably under $80.
Yes, the tread is thinner than an S-TR, but if you have them mounted on wide, aero wheels, you will be wearing a flat spot onto the tread long before those are worn out, or just losing grip from the rubber degrading from time in the sun. There really isn't a downside to the TT TR, unless you like to run your tires until they show threads.
The Continental Grand Prix 5000 TT TR Road Tire is fit for race day. Supple, low rolling resistance and holds the line when you dive into the corners. They installed on my Zipp 404's with relative ease. The sea was good.
I do not use it for training everyday rides. Even though I have not had a flat with it after 450 miles of "big boy" riding.
Have fun with these shoes. They have performed to my expectations.
