I used to do 45 on my trek semi regularly; now it gets the wobbles over 40. I didn't let the lynskey loose because I don't yet fully trust the discs. The biggest hill had a hard left before the bottom. Felt great at 36mph. Next time.
I assume mine's comfortably under 20 lbs without the tool bag and with the original seat. I'm sure the discs and 28 c's are heavy. Enjoy!