If it's a flat TT there have also been some very fast times in the past Fixed which doesn't give up much to 3 speed for gearing and can be very efficient/aero. US 40K national record (still held by John Frey) on a 52x13 being one example.
I know it was a fast course but it's amazing that the oldest record in the USA Cycling book is in the discipline that should be most impacted by technology.
Last edited by Voodoo76; 09-27-19 at 11:47 AM.