Big difference between road bike and gravel bike with road tires?

[DaveWh]

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Gravel vs Road bike

Hi, This is a possibly how longs a piece of string question, with a lot variables that no one will be able to quantify. I for the most part don’t race and don’t don’t do a heap of group riding. I do a few long endurance races/challenges through the year, and a bit of hills riding 100-150km. My normal ride I do around my area is flat-undulating coastal ride on very good condition asphalt. Q) I currently ride a Cervelo S3, riding this loop 55km, taking my last ride I averaged 34km/h at 250w. I…