900. Which tires on each?

900

Schwalbe ironman

On both? Cause if that's the case then 900.

900 disc

Not sure how those tires perform aerodynamically, but the rolling resistance isn't very good. GP4000S with latex tubes and sealant.... I still think is an ideal all around set-up... with Conti attacks being another great option too.

If your average speed is over 22mph, your yaw is pretty low and unless there's very strong crosswinds, the disc won't save you all that much time...but still would be faster. It does sound faster. I wonder the the Zipp has a smoother, more compliant ride. That might matter more. Just a thought.

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I had just thought I saw somewhere that the 808 was better than a 900 standard disc

I think rolling resistance for scwalbe is the best out there according to tom a?