In the design and development of tires, the robust grip performance is a key role in different road conditions such as dry or wet load. The objective of this study is accurate prediction of friction coefficient on the wet road by using numerical analysis. Therefore, we developed a finite element analysis (FEA) solver for hyperelastic materials to apply flow–structure coupling simulations. In this paper, we investigated the validity and applicability of the structure and flow solver. As a result, present numerical method we developed showed good agreements with theoretical and experimental values.