Well trueblue, I know at around town speend its pretty acurate. Theres a couple "you're going this fast'' radar signs on my daily commute but I have no clue how on point it is above 100kph, all I know is when the speedo hit 180kph it was screaming and things started to get light hahaha. Sure was fun at whatever speed I was actually doing, Ill have to get my buddy on his RC51 to compare speedo numbers next time I'm out with him.