The e-RAD BBS HD-1000 Mid Drive Electric Bike Conversion Kit is one of the most powerful electric bike motors available, ideal for heavy duty cargo hauling, blurs the line on legality shipping with 20 mph top speed limit but unlockable to ~40 mph for off-road use. Offers physical shift detection compatible with cassettes, internally geared hubs and CVT systems like NuVinci, this reduces drivetrain wear on the chain, sprockets and derailleur significantly. Three battery size options (all run at 48 volts) with premium Samsung, Panasonic or Sanyo Lithium-ion cells, solid one year comprehensive warranty on all parts. Choose from trigger throttle or twist throttle (for left or right bar), you can wire in lights, the system lets you override pedal assist with the throttle and the display looks great but doesn’t swivel and isn’t removable, as with most aftermarket kits the wires use zip ties to attach and may add clutter to the frame.