Since it is built into a transit body, it may have a high numeric axle ratio for city driving, and work hard at interstate speeds. But on the other hand, since the bus is all custom, they may have specified a more appropriate axle ratio when it was ordered.
If I were going to bid, I would first email the contact and ask what the cruising speed is.
Someone said "Making good decisions comes from experience, experience comes from bad decisions." I say there are three kinds of people: those who learn from their mistakes, those who learn from the mistakes of others, and those who never learn.