Detachable lifts are called high-speed or quad lifts. They move at a pace of up to 18 kph (11 mph) -- or even faster at some resorts. They're capable of transporting 80 to 100 people per hour. This makes them a good option if you're trying to get to the top of a mountain in a hurry or if you want to get multiple runs in during the time you'd normally spend on one run. Fixed-grip lifts are called low-speed or double chairs. They move at a pace of up to 10 kph (6 mph), making them more suitable for beginners, young kids, and slower skiers and riders.