Dayco was the first to develop the raw edge sidewall construction
V-belt, which facilitated controlled slippage around pulleys.
Top Cog® V-belts
Raw edge construction is combined with the
Dayco patented cogged top design to ensure the top performance that
today’s vehicles and drivers demand. The Dayco Top Cog® V-belt
delivers more flexibility, and increases airflow around the belt, so it
runs cooler and lasts longer than competitors' V-belts. Three plies of
neoprene impregnated fabric resist heat, oil, and grease, and a specially
formulated treatment of the polyester cord provides strength, stability,
and reliability.