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Why do trucks and buses have broader wheels than that of cycle scooters?

The broader wheels on trucks and buses serve several important purposes:

1. Weight Distribution: Trucks and buses carry significantly heavier loads compared to cycles and scooters. Their broader wheels help distribute the weight evenly over a larger surface area, reducing the pressure exerted on the road. This reduces wear and tear on the road surface and improves overall road safety.

2. Stability and Handling: The broader wheels enhance the stability and handling of heavy vehicles. They provide a wider contact patch with the road, increasing the friction between the tires and the road surface. This improved traction helps maintain control during turns, reduces the risk of skidding, and enhances overall handling, especially when carrying heavy loads.

3. Better Load-Bearing Capacity: Broader wheels can carry heavier loads efficiently without deforming or compromising the tire's structure. They provide increased support for the vehicle's weight, reducing the chance of tire failure and increasing the durability of the tires.

4. Reduced Rolling Resistance: Broader wheels have a lower rolling resistance than narrower wheels. This improves fuel efficiency as less energy is required to overcome friction and propel the vehicle forward. Reduced rolling resistance also translates to lower fuel consumption and decreased emissions.

5. Enhanced Traction: The increased surface area of broader wheels provides better traction, particularly on slippery or wet road surfaces. This improved grip helps maintain control and reduces the risk of accidents during adverse weather conditions.

6. Improved Braking Performance: Broader wheels often have more efficient braking systems. With a larger contact patch, the brakes can apply more force and dissipate heat more effectively, shortening braking distances and enhancing overall safety.

In contrast, cycles and scooters are relatively lightweight vehicles designed for personal transportation. While they benefit from narrower wheels for better maneuverability, they prioritize fuel efficiency, agility, and ease of handling, which are better suited for their intended use.