From what I recall this was already discussed, which from what I recall the 63 km/h speed is without the mine protection, but it’s limited to the speed it has in-game when it does have the mine protection irl with the limiter that was placed on the transmission. The thing is that gaijin doesn’t have a thing in-game which change the speed limiter on any ground vehicle in-game, but all things considered it shouldn’t that hard to code compared to other stuff they added.