They look cool. Whether you move to a larger-diameter wheel as an option on a new vehicle or as an aftermarket upgrade on the car you already own, there are plusses to plus-sizing, but some minuses as well. When you move to a larger wheel diameter (such as from 17 to 18 inches), you need tires to match. Those tires need a lower profile (or sidewall height) to maintain adequate clearance when they go over bumps and potholes, which makes the suspension fully compress and rebound.
Consumer Income. Changes in consumers' income cause a change in the demand for a good or service. When consumers' income increases, demand for goods also increases, causing the demand curve to shift to the right. This is because consumers spend more money when they have higher incomes.
3 The Supply Curve 9 What Causes Shifts in the Supply Curve? 10 Changes in input prices.  An input is a good that is used to produce another good.  An increase in the price of steel will lower the supply of automobiles.