What type of brakes are typically used on racing go-karts?

Racing go-karts typically use disc brakes.

A kart’s disc brake normally consists of a rotating metal disc mounted on the axle and a caliper that squeezes brake pads against it. This arrangement provides strong, controllable braking in a compact and relatively lightweight package, making it well suited to racing.

Many direct-drive racing karts use a rear disc brake mounted on the rear axle. Shifter karts, which have a gearbox and can reach higher speeds, commonly add front disc brakes as well. Their braking systems may use separate controls or adjustable front-to-rear brake bias.

The answer is not universal for every kart. Rental, vintage and specialized karts can use different arrangements, and electric karts may combine mechanical brakes with regenerative systems. Still, among modern racing karts, disc brakes are the standard answer. Rim, band and drum brakes are not the typical racing-kart setup.