Food Cheese, Cheddar is not acid - it is ok to consume it without worries about heartburn. For more details search on food acidity and alkalinity look at the list below. Items with higher values are the safest for your stomach. For more details on specific food items and whether they cause heartburn or not take a look at Food Database.
Width is otherwise known as the breadth. It is the distance from one side to the other side which measures across a particular shape or object whose lengths are forming right angles with the sides as in the case of a rectangle.
These are 225s, so the width is 225 millimeters, or about 8.85 inches. The next number is the aspect ratio. This is the height of the side wall expressed as a percentage of the tread width. For simple math, say you had a 225/50 tire, the sidewall would measure 50% of the section width. 50% of 225 is 112.5mm, or 4.4 inches of sidewall. The last number is the rim size.