It is flat but bumpy, there are 2 hills of note enroute and then a few in the last 10 or so KMs on the South Downs (but we will be walking by then because 15/20% chalk ascents can >>>>>).
People have come on MTBs and Crossers before (and a Lo-Pro too..).
are people doing this fixed? how not hilly is not hilly? just deciding whether to gear down the pomp....