The difference in recommended tire pressure between bicycles and cars can be attributed to several factors:
Weight Distribution: Bicycles typically have a much lighter weight compared to cars. The weight of the vehicle affects the amount of pressure needed to support the load and maintain proper tire contact with the road surface. Since bicycles have a significantly lower weight, they require higher pressures to support the load adequately.
Tire Size and Construction: Bicycle tires are smaller and narrower than car tires. The smaller contact patch of bicycle tires means that the pressure needs to be higher to distribute the load across a smaller surface area. Car tires, on the other hand, have a larger contact patch and can distribute the weight over a larger area, allowing for lower tire pressures.
Suspension Systems: Cars are equipped with suspension systems that help absorb shocks and impacts from the road, providing a smoother ride. The suspension system helps distribute the weight more evenly and reduces the reliance on tire pressure to absorb road irregularities. Bicycles generally do not have suspension systems, so the higher tire pressure helps absorb shocks and provide a more comfortable ride.
Handling and Performance: Bicycles require higher tire pressures for improved handling and performance. Higher pressures reduce rolling resistance, allowing for better efficiency and faster speeds. Additionally, higher pressures help prevent pinch flats and improve cornering stability in bicycles.
It's important to note that the recommended tire pressure for bicycles and cars may vary depending on factors such as tire type, terrain, rider weight, and personal preference. It's always best to consult the manufacturer's guidelines or seek advice from a qualified professional to determine the appropriate tire pressure for your specific bicycle or vehicle.