It's do-able. I've hit 210 on easy gear sprints on a road bike.
I lolled because of the likelyhood of some brakless fixie skidder managing it and doing 49mph down test hill in RP.
Garmins are notoriously out of whack with cadence though, best way is to know your gear and your speed then work it out. Also hitting 200rpm on wheel replacement rollers with very little resistance is much easier than in the "real world"
It's do-able. I've hit 210 on easy gear sprints on a road bike.
I lolled because of the likelyhood of some brakless fixie skidder managing it and doing 49mph down test hill in RP.
Garmins are notoriously out of whack with cadence though, best way is to know your gear and your speed then work it out. Also hitting 200rpm on wheel replacement rollers with very little resistance is much easier than in the "real world"