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2. List of price index formulas - Wikipedia

   en.wikipedia.org/wiki/List_of_price_index_formulas

   A price index aggregates various combinations of base period prices (), later period prices (), base period quantities (), and later period quantities (). Price index numbers are usually defined either in terms of (actual or hypothetical) expenditures (expenditure = price * quantity) or as different weighted averages of price relatives ( p t ...

3. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   Prior to 1964, tires were all made to a 90% aspect ratio. Tire size was specified as the tire width in inches and the diameter in inches – for example, 6.50-15. [29] From 1965 to the early 1970s, tires were made to an 80% aspect ratio. Tire size was again specified by width in inches and diameter in inches.

4. Price index - Wikipedia

   en.wikipedia.org/wiki/Price_index

   A price index (plural: "price indices" or "price indexes") is a normalized average (typically a weighted average) of price relatives for a given class of goods or services in a given region, during a given interval of time.

5. Producer price index - Wikipedia

   en.wikipedia.org/wiki/Producer_price_index

   A producer price index (PPI) is a price index that measures the average changes in prices received by domestic producers for their output. Formerly known as the wholesale price index between 1902 and 1978, the index is made up of over 16,000 establishments providing approximately 64,000 price quotations that the U.S. Bureau of Labor Statistics (BLS) compiles each month to represent thousands ...

6. Wheel sizing - Wikipedia

   en.wikipedia.org/wiki/Wheel_sizing

   Increasing the aspect ratio will increase the height of the tire and hence the circumference. Off-roading tires may use a different measurement scheme: Tread width × Outside diameter, followed by wheel size (all in inches) – for example 31×10.50R15 (787 mm × 267 mm R380 in metric designation). The size of the wheel, however, is denoted as ...

7. How Much Does Buying Tires at Sam’s Club Save You? - AOL

   www.aol.com/much-does-buying-tires-sam-202540437...

   Price per tire: $276.24. ... Whether buying tires at Sam’s Club will save you money in real life really depends on the specific brand and size of tire you want — plus, any discounts offered at ...