Universal Heavy-Duty HTD Cog Belt by Jones Racing, 1 Piece. Radius Tooth. Less resistance means more power! Jones Racing heavy-duty radius tooth belts offer positive belt to pulley contact, requiring less tension and reducing friction. Less friction equals more horsepower! Jones Racing replacement HTD belts are manufactured to fit their smaller, lightweight components and together, your radius tooth drive systems and pulleys will produce less friction, less inertia, and less component stress for horsepower-gaining results. Do you need to replace your HTD belts? Your only choice is heavy-duty radius tooth belts from Jones Racing.