Abstract: The paper investigates the effect of carbon black (CB) types and loading on curing and physico-mechanical properties of solid tire tread compounds comprised of Natural Rubber (NR) and Butadiene Rubber (BR) blend. N326, N330, and N375 were the CB types loaded in the rubber compounds at 53-60 parts per hundred parts of rubber (phr), which was a predetermined loading level. Tensile strength, tear strength, hardness, abrasion resistance, and cure characteristics were tested, keeping the N330 CB type at 60 phr loading as the control compound. The cure characteristics of all the compounds showed good processability, processing safety, and curing efficiency. The CB type N375 at 55 phr loading showed better tear strength, tensile properties, hardness, and abrasion resistance than the other compounds. Of the three types of CBs used in tire tread compounds, the N375 CB type was the ideal type for solid tire treads, according to this study. However, there is a choice of CB type and loading level as the requirement of mechanical properties.