In this work, tire tread rubber materials with simple composition based on the green tire compound are studied regarding friction properties. Using two different fillers, namely carbon black N234 and silica, friction experiments for different conditions varying speed, load and water-soap solutions are performed on two granite surfaces with different roughness. Additionally, the extended theoretical concept of Klüppel & Heinrich is used to quantify the different inputs contributing to total friction forces at dry and wet conditions.Friction results show highly nonlinear behavior of the coefficient of friction by changing different influencing factors. Both contributions, adhesion forces and hysteresis friction can be identified using simulations and quantified for experiments with pure water.