The treads are the patterned rubber part of your tire that actually meets the pavement, here's how to check them.

Performance properties of a surface treated low hysteresis carbon black (Continext-LH) compound in a natural rubber tread formulation are compared with those of a conventional N234 low hysteresis ...

Package consists of 2x 26 x 1.95 Foldable Slick bike tires Leno. Tyre for Electric Road MTB Mountain Bike Hybrid Street Bike - ETRTO 50-559 - Suitable for 26" Wheels Made of high-quality nylon and ...