English: Body ply denier, cord style, EPD (Ends Per Decimeter) or EPI (Ends Per Inch), and number of plies affect body strength and are chosen based on manufacturing, engineering, and design criteria. Likewise steel cord construction (style) and EPD both affect belt strength and are chosen typically based on tire size and application. Belt widths and belt crown angle (see figure 1.8) also influence tire performance. Different crown angles change the belt package stiffness, laterally and longitudinally, which can affect cornering ability and ride. Belt widths can also be varied. If a high speed rating is required, the addition of nylon cap strips at the belt edges or full-width nylon cap plies may be added. The bead and sidewall areas can also contribute to subtle performance enhancements. The bead filler volume and height, as well as the location of the end of the turned-up body ply (see figure) all impact sidewall stiffness.