Check out the Racer X Show now live on RacerTV.com or RacerXOnline.com (not TV) for highlights from Monster Energy Supercross and more. if you aint first your last. Miss Supercross showing off her riding skills. #DallasSX #ArlingtonSX #Supercross #SX #Motocross #Moto #MX #WhosNext #SXonFOX @supercrosslive @promotocross