Sram Automatix 2-speed Hub 36h Coaster Brake 130mm

Automatix:~ It changes gears when you reach a certain speed limit and then shifts back when you slow down. With its two gear ratios, 1:1 and 1:1.37 (124%) it is best suited for bikes in urban surroundings. No need for shifters and cables that can come with adjustments. The nickel-chrome plated internal gear hub comes in either coaster brake or freewheel options.