COST 334

Chapter 4The following conclusions can be drawn from the footprints.1) The 295/60R22.5 twin tyres (Figure 4.30 and 4.31) with a smaller diameter than the315/80R22.5 twin tyres (Figure 4.32 and 4.33) show shorter footprints and more areas ofhigher surface pressure under the same tyre load, but with higher tyre pressure of the tyreswith smaller diameter.2) The surface pressure distribution of the 315/80R22.5 twin tyres (Figure 4.32 and 4.33)is similar to that of the 495/45R22.5 super single tyre Figure 4.36 although the 495 tyrehas a higher inflation pressure.3) Under the same tyre load, the 385/65R22.5 (Figure 4.35) single tyre shows more areasof higher surface pressure than the 315/80R22.5 twin tyres (Figure 4.32 and 4.33).4) The different tyre loads in Figure 4.34 and 4.35 can be seen clearly. The 385/65R22.5tyre shows a slight longitudinal enlargement of the footprint surface with higher tyre load(Figure 4.35) compared to Figure 4.34, but also more areas of higher surface pressure.version 29 November 200165