Michelin Power Time Trial

https://www.bicyclerollingresistance.com/road-bike-reviews/michelin-power-time-trial-2020

The Power Time Trial with a latex tube shows us rolling resistance is the same as the ultra-fast tubeless Vittoria Corsa Speed G+ 2.0 at high air pressures. Only at very low air pressures, the tubeless Corsa Speed is a bit faster. If you’re still using inner tubes and looking for the fastest tires, the Power Time Trial with latex inner tubes is what you should be looking for

Try this tire or just stick with the GP5000?

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I have a 23 & 25 on my shelf I was going to use for racing this season.

Looks like an OK TT tire, but flat protection is even worse than some of the other fast tires.

I don’t really think you should compare the 5000 against these tires. The 5000 is a great daily use tire. The tubeless version has been incredibly durable for me and very good against flats, but if you are looking for the last watt of Crr savings, it still looks like the Vittoria wins.