cars are smooth because they are sanded down and then spray painted with nylon paint
to reduce air resistance
A smooth, aerodynamic design.
Songbird by Kenny G
tire tread is for better traction on slippery surfaces smooth tires are for racing at hi speed
If polished or otherwise smooth enough to do so, yes, it can.
To create a smooth transition between the rotation of the engine to the gearbox.
reduce air resistance
More rubber in contact with the road = more grip
to move easily on rough suface like roads etc...
If the one they are for likes cars, and has some smooth space to race them, they are very cool.
Cars need an exterior window trim to give the vehicle a new look. The trim makes the windows more smooth and shiny, and less susceptible to scratches and stains.
They run quiet, fast, ultra smooth, and with a wider contact patch, plus they grip like mad.