Agricultural tyre stiffness change as a function of tyre wear

•Change in tyre contact patch size due to tread wear on large lugs tyres.•Vertical stiffness change due to the change in tread wear on tyre with large lugs.•Predicting the vertical deflection point at which the vertical tyre stiffness change.•Lateral and Longitudinal stiffness characteristic change due to tread wear.•Study show importance of using representative tyre data for tyre modelling.