Ever notice some planes have really fat tires and others have skinny ones? Those differences actually solve different problems based on where each plane lands. Smaller aircraft need to use grass, dirt, and gravel runways constantly. Landing on grass creates a lot of ground resistance right when you touch down. If you used thin tires, they would punch through and get stuck in mud. Fat tires spread the airplane weight over a bigger area so it does not sink. Large airliners like a 747 only land on paved concrete airport runways. Concrete runways are designed to support the massive weight of heavy aircraft. A 747 has 18 wheels spread across multiple landing gear trucks for weight distribution. On paved runways, thinner tires are actually better because they grip concrete. Small plane tires run at low pressure to stay soft and absorb impact on rough ground. Airliner tires run at very high pressure to stay stiff and handle fast landings. Each aircraft design matches exactly where it needs to land and how hard. Now you know why landing gear varies so much from plane to plane, so follow for more flight science.
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