Installation video: https://www.youtube.com/watch?v=ghSGC7JE1_s -- Top speed under 35 Mph. NYC consumers please review fire safety info available here: https://www.nyc.gov/site/fdny/codes/reference/lithium-ion-battery-safety.page | Dyu | | 14 inch eBike w/ 25 Miles Max Range & 20 Mph Max Speed | Black | Best Buy