Masked is pretty sure we never concluded the discussion about the Sons of Calydon's motorcycles, which Billy's would presumably scale above. Masked had the idea that the motorcycles would probably scale above the surfboards in
Tales of Midsummer Dreams, since Lucy says this:
We've perfectly recreated that rush of riding through the Outer Ring in this surfing experience!
It's not a perfect justification by any means, but they are presumably the same modifications they make to their motorcycles, since that's what they have experience with.
The slowest surfboard is "
Superhuman, up to
Subsonic" (Cruising speed of 97 km/h with a top speed of 183 km/h, or 26.9444 m/s to 50.8333 m/s)
The fastest surfboard is "
Superhuman, up to
Subsonic" (Cruising speed of 122 km/h with a top speed of 230 km/h, or 33.8889 m/s to 63.8889 m/s)
However, Masked would like some more input on this.