Solid Tyres

solid
Strongly built or made of strong materials; not flimsy or slender
Firm and stable in shape; not liquid or fluid
the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape
matter that is solid at room temperature and pressure
Having three dimensions
characterized by good substantial quality; "solid comfort"; "a solid base hit"

tyres
A rubber covering, typically inflated or surrounding an inflated inner tube, placed around a wheel to form a flexible contact with the road
(tyre) Sur: a port in southern Lebanon on the Mediterranean Sea; formerly a major Phoenician seaport famous for silks
A tire (in American English) or tyre (in British English) is a ring-shaped covering that fits around a wheel rim to protect it and enable better vehicle performance by providing a flexible cushion that absorbs shock while keeping the wheel in close contact with the ground.
A strengthening band of metal fitted around the rim of a wheel
(tyre) tire: hoop that covers a wheel; "automobile tires are usually made of rubber and filled with compressed air"