What are the different types of brake systems available for mountain bikes?

The different types of brake systems available for mountain bikes are rim brakes, disc brakes, and hydraulic disc brakes. Rim brakes use pads that press against the wheel rims to slow down the bike. Disc brakes use a rotor attached to the wheel hub and calipers that squeeze the rotor to stop the bike. Hydraulic disc brakes use fluid to transfer force from the brake lever to the calipers, providing strong and consistent braking power.