I am one of the rare breed that isnt too excited about the GP5ks. They perform well - sure. I have them on my tri bike as I find them to be the best compromise between speed and puncture resistance.

But in terms of ride feel, i much prefer the Turbo Cottons and Veloflex Corsas. Both of them are rated to have a higher RR, as per BRR, though, so there is that. The Turbo Cottons and Corsas dont feel slower than the GP5ks, but obviously, this level of difference is going to be hard to judge just by feel. If running Corsa Speeds tubeless makes them perform reliably enough w/r/t flats, that may become my speed tire.

I also have a pair of Wolfpack tires waiting to be mounted - anyone here use them and can compare? Supposedly made by the same guy who invented Black Chili, Gripton and Addix.