Which type of landing gear is commonly used in nearly all fixed-wing aircraft?

The majority of fixed-wing aircraft utilize the tricycle-type landing gear configuration. This design features two main wheels located under the wings and a smaller nose wheel at the front, providing stability and better control during takeoff and landing. The tricycle configuration simplifies taxiing on the ground and allows for a level attitude during landings, which is advantageous for preventing nose-over incidents.

In addition, the tricycle landing gear enhances aerodynamic efficiency and improves pilot visibility on the ground. This configuration is prevalent among commercial airliners, general aviation aircraft, and military planes, making it the standard landing gear type in aviation. The design is not only favored for its operational benefits but also contributes to better handling characteristics, which are critical during the landing phase.