Because, believe it or motorlistrikindonesia not, dugaanpenyimpangan the wider the tire (assuming the pressure stays the same) the lower the friction, or dugaanpenyimpangan rolling resistance, bengkelmotorlistrik is on the tire. Since about 20% or so of all the energy lost by a vehicle comes from rolling resistance, it’s a good idea to try to minimize it. Less energy lost = better gas mileage. The equation for rolling resistance is Fr = CrN Where Cr is the coefficient of rolling friction, equal to √(z/d), d being the diameter of the wheel and z being the sinkage depth, and pengawasankejaksaan N is the normal force, which for a bus on a flat surface is simply equal to the force due to gravity, mBg, where mB is the mass of the bus and g is the acceleration due to the Earth’s gravity, 9.8 m/s2.

So, plugging in those expressions, Fr = √(z/d)mBg. Notice that width is not involved in that equation. The way that energy is actually lost from a wheel is from a process called hysteresis. Hysteresis is, basically, the following process. As a tire rolls, part of it is getting compressed by the ground, while the other part is reforming back into its original shape. If you’ve studied thermodynamics at all you know that all systems are naturally decaying via entropy, which in this case means that the tire must lose more energy from compression than it gains back from reforming, yielding a net loss of energy.