Originally Posted by
Ttoc6
Big-S claims it's the same aero as the original venge or the new tarmac rim brakes. And we've seen data that suggests disc specific wheels are more slippery than rim brake wheels. The weight of the frame is the same, albeit the disc gruppo will weigh more and I suppose the caliper may or may not create a bit more drag, but is it offset by the wheels?
Just playing devil's advocate here. Everyone is entitled to their opinion about what bike is best and what data they want to look at!
I agree with the first part, but data is data.
The rim brake version was as aero as the original Venge. At this point disc calipers and rotors increase drag. That may change in the future (though I suspect it may never be true at zero yaw).
Disc groups are heavier, and IME for equivalent bikes the disc brake fork is heavier than the rim braking equivalent.
So far we are not seeing anything materially different as far as aerodynamics of disc-specific rims. Truthfully I don’t know if the rim brake track was much of a hindrance.
However one cuts it, the Tarmac disc is both heavier and less aero than the rim take SL6.
One may PREFER the disc brake version, of course, but it won’t be for those two traits.