Grugs top speed?

I am genuinely curious what Grug’s top speed is. During the breakfast scene it seems like he’s running 24.7 m/s (55 mph) by timing how long it takes to run in 1 second compared to his height, but that’s only a part of him, like when you go on a run you don’t go fully 100%, you go 70% or 80%. So if he is running at 55 mph for a running pace, then that means he can reach up to 70-80 mph which is inhuman but it’s grug so idk.