Originally Posted by
HTupolev
What assumptions are being made by the calculator as far as rolling resistance and aerodynamic profile?
Based on GhostRider62's claimed CdA, 30mph at sub-300W should be very doable in reasonable road conditions.
48 kmh on the flat at 280W? Sounds possible to me. I once did 42.5kmh at -0.9% with only 192 NP.
Wind plays a key role here though I would say.