The Profi-line rim has been designed specifically for agricultural trailed and other load-bearing vehicles. Implement or trailed agricultural equipment with wide tires are continually exposed to high stresses, with one of the most stressed areas of the rim generally being the well radius. Trailed wheels must perform in arduous conditions whilst avoiding unnecessary weight and the associated impact on soil compaction. With the aim of continuous improvement, GKN Wheels and Structures has developed a new rim profile concept able to minimise stress in that radius. To develop the more structurally efficient rim profile, detailed research using Finite Element Analysis (FEA) and acquisition of stress data by use of strained gauge wheels was carried out. This performance enhancement is based on two key changes in rim design— a rolled over flange and a double well radius. The new profile gives a stress reduction in the critical area around 40% compared with the traditional rim shape and as a result fatigue life is more than five times longer. These benefits are achieved whilst reducing rim gauge and weight without any loss of performance. The rim was developed to cope with the increased pressures of heavier loads and longer periods of use. This means more working hours for the wheel, particularly for heavy machines with intensive usage. The Profi-line rim design is offered across the GKN range of flotation wheels and is available in sizes from 16.00 x 22.5\\\" to 28.00 x 30.5\\\".