Classified Powershift Rear Hub Kit Shift Gears Instantly Powershift Technology is a wireless shifting system that allows you to shift gears instantly and under full load. The Powershift hub offers unrivalled shift quality, featuring a wide gearing range and small step increments, which combines the benefits of both 1x and 2x drivetrain systems. The 2-speed hub multiplies the cassette's range so riders can always access the right gear and cadence to reduce gear grinding, remove huge gear steps, and avoid extreme chain lines. The Powershift system is highly versatile and reliable in all conditions, supporting many riding styles and disciplines. Features The Flat Bar Kit includes an 11-40T 12-speed cassette and lockring The Drop Bar Kit requires the purchase of a Powershift cassette and rear thru-axle for specific application Instant shifting with the ability to shift under full load (up to 1000 Watts)Wireless shifting communicates via Bluetooth and sends a signal to the Smart thru-axle that triggers the hub to shift using contactless energy transfer | Classified | Powershift Rear Hub Kit 12 X 148Mm Center Lock 28H Flat Bar