The SLACK CORE comes in 4 Variants (60V – 72V), 110 KMH to 145 KMH (68+ MPH, 74+ MPH, 90+ MPH) This article has been updated with the most recent information from NUMO. The model names and speed specs have been fixed. More info to come! We’re not kidding you, … Continue reading NUMO Introduces the 90 MPH SLACK CORE, 72V Extreme Performance Electric Scooter