Becker, Carl MartinEls, Pieter Schalk2023-02-142022-08Becker, C. & Els, S. 2022, 'Agricultural tyre stiffness change as a function of tyre wear', Journal of Terramechanics, vol. 102, pp. 1-15, doi : 10.1016/j.jterra.2022.04.001.0022-4898 (print)1879-1204 (online)10.1016/j.jterra.2022.04.001https://repository.up.ac.za/handle/2263/89465Vehicle designers use tyre characteristic parameters to parameterize tyre models during the design phase of a vehicle to determine the ride comfort, handling and performance. Tyre data is mostly presented only for new tyres with 100% tread on them. Soft terrain traction and minimal compaction have always been major requirements for agricultural tyres, however agricultural vehicles are increasingly being used on asphalt/non-deformable terrain as commercial farms are ever increasing in size. As operational costs are always forced to a minimum, agricultural vehicles operate with tyres ranging from new to fully used condition ranging from 100% down to almost 0% tread on them. During the operational life of a tyre the tyre characteristics change as the tyre tread wears down. This study investigates the change in tyre characteristics on hard terrain with tyre wear at a single load condition, two different inflation pressures and three tread wear conditions. Significant trends are noted with dramatic changes in traction and tyre stiffnesses as the tyre wear changes.en© 2022 ISTVS. Published by Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Journal of Terramechanics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Journal of Terramechanics, vol. 102, pp. 1-15, 2022, doi : 10.1016/j.jterra.2022.04.001.Agricultural tyreTyre wearP80 sandpaperLongitudinal stiffnessLateral stiffnessVertical stiffnessCleat Inflation pressureTyre characteristicsEngineering, built environment and information technology articles SDG-04SDG-04: Quality educationEngineering, built environment and information technology articles SDG-09SDG-09: Industry, innovation and infrastructureEngineering, built environment and information technology articles SDG-11SDG-11: Sustainable cities and communitiesAgricultural tyre stiffness change as a function of tyre wearPostprint Article