What do TRWP look like, how big are they, can I see them with the naked eye?

TRWP are tiny, elongated particles of tire tread and road pavement material.

TIP sponsored studies have placed the size of TRWP in the range of 100μm. This is very small, but large enough for the human eye to see. A human hair is approximately 100μm (0.1mm) thick.

Importantly, these studies have demonstrated that the shape, size and composition of TRWP is the specific result of the wear mechanism created at the tire pavement interface. Particles generated through lab-based mechanical abrasion / grinding of tire tread have different physical and chemical characteristics than those of TRWP.