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Tire model is one of the most significant components of vehicle ride and durability simulation. A balance of calculation accuracy and computational efficiency is always desired in the modeling work. This paper proposes a new discrete ring model for the characterization of the tire enveloping properties. Two modeling concepts are put forward: assuming a stationary tire loaded on a moving road. In this case, the contact interactions can be treated with a tread arc instead of a complete circular. The second operation is decoupling the grid discretization of the tire structure. A higher number of the discrete units at the pre-contact area convinces the calculation results. The discrete elements are relatively sparsely distributed at the non-contact region, which guarantees a competitive time consumption. In this paper, the simulations are validated with the measurements of different operational conditions.