Wheel sizing - Wheel size. 1  The wheel size is the diameter of the wheel in inches where the beads of the tire sit on the wheel. This measurement does not include the rim flange. Modern road tires have several measurements associated with their size as specified by tire codes like 225/70R14.
While the minimum bid per keyword is 5 cents in AdWords, the high cost keywords listed above are nowhere near that. Google can make up to $50 per click from the most expensive PPC keywords. Keyword advertising is a highly lucrative business for Google. Learn more about the costs of AdWords here.
Pay per click (PPC) and cost per click (CPC) are both forms of CPA (cost per action) with the action being a click. PPC is generally used to refer to paid search marketing such as Google's AdSense or Ad Words. The advertiser pays each time someone clicks on their text or display ad. Cost per click on the other hand is generally used for everything else including, email marketing, display, contextual and more.