This paper describes the use of the ADAMS (Automatic Dynamic Analysis of Mechanical Systems) computer program to model and simulate the performance of an anti-lock braking system (ABS). A study has been carried out based on a quarter vehicle model and an integrated tyre model to represent the changing forces at the tyre contact patch during braking. Added to this is a theoretical model which uses equations and functions to replicate the behaviour of a typical ABS system during hard braking. The data used to develop the tyre model is based on tests carried out within the School of Engineering at Coventry University. Tests were performed to establish the relationship between tyre braking force and wheel slip. As braking torque is applied to the wheel, slip increases until the wheel is locked and skidding occurs. The simulation results presented here demonstrate how an ABS algorithm can be incorporated into a vehicle braking model in order to avoid wheel lock during a severe braking manoeuvre. One of the main objectives of this paper is to demonstrate how tyre and ABS designers can use the model to investigate the complicated interaction between the tyre and the ABS system. This is demonstrated by comparing the ABS algorithm with models using data for two different tyres and also investigating the influence of changing road conditions from dry to wet to ice. The paper concludes with a discussion of the practical difficulties involved in measuring wheel slip on an actual vehicle and the planned development of an ABS algorithm within ADAMS to account for this.