Thank you for viewing. This is a motor set for sale as I am retiring from Mini 4WD. For reference, I measured them before listing: Hyper Dash Pro 2019: Approximately 26,000 RPM Mach Dash Pro: Approximately 33,500 - 38,000 RPM. There may be variations depending on the measurement environment. I haven't used them in a while, so I haven't done a running test. Please understand that these are used items and only purchase if you are okay with that. Please refrain from purchasing if you are sensitive to such things.