Detailed, highly specific analysis has proven standard QP NASCAR speed to average at 69.69 km/h. While the methodology used is proprietary and will not be disclosed, rest assured it's completely accurate and impartial. With that fact having been established, now you can see how a JR7 moving at 78.7 km/h is perfectly acceptable. You're quick enough to play escort to your assault mechs', by which I mean you have on average 300-350 tons of "meatshield" before any enemy should focus fire on you. Just target what everyone is shooting at and deal up to 72 damage as your contribution.