Hi Chris - thanks for your assistance here.

I've been trying to understand the differences between the various Shiv framesets - the S-Works module, the Pro frameset and the frameset on the Comp Rival and Expert Models.

As far as I can tell:
1/ the Pro frameset is the one on the Comp and Rival bikes
2/ the S-Works and the Pro framesets are identical except for the different grade of carbon

Is this correct? And what are the real-world differences between the S-Works and the Pro framesets, in terms of stiffness, aero, handling, etc?

I am trying to decide which one to get, and the website doesnt really provide this information.

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Those who are slower than me suck.
Those who are faster than me dope