This year I've decided to put some Vittoria Corsa Evo CX tires with latex tubes on my HED race wheels. This setup is replacing Michelin Pro3's and butyl tubes. I know that my new setup gives me a few extra watts, but what does this really mean? If I do a ride at 300 watts according to my powertap, would it equate to something like 305 watts with the new tires and tubes?

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