I have no clue, but if someone comes along and has all the rings and everything and they helps to get a better time, I'll just give it up to them, because I can't be bothered to farm for those looms myself.

I haven't checked, but with the new hunter rare pets that show up in Elwynn if they give rare mob levels of EXP as well, it might be a tighter time. I'll likely get back into the races at some point, some other things on my plate as of right now, but good run either way.

I think it'll eventually come down to just depending on RNG and killing a specific number of mobs between rare spawns and using the bike in the downtime because the walking travel time is what really starts to add up, moreso in the last two levels.

EDIT: Also, it was a good move putting the trike under favorite mounts beforehand.