it's a bike speedometer, you need to enter your wheel diameter when calibrating the thing, i bet the people in the movie didn't calibrate it at all ....
so for every revolution of the wheel the speedometer thinks it went over a distance equal to the circumference of a bike wheel instead of a hamsterwheel ....
so i call shenanigans !
Belgium represent !
"The windows are vertical how am i going to poop on those?"-Killabees
"God isn't black, you fucking moron!"-Shibby
"I shit rainbows and sneeze glitter."-Arabian