I've tried them, sure... a couple times a week for the past 2 or 3 weeks. I also do not find 85rpm to be much of a challenge. I've been riding a 53T in front (now swapped out and replaced by a 50T) and, maybe, the 23 in back. With that, I can hold 90-something -maybe more- and the last two reps are a LOT harder than the first two.