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  2. ISO 5775 - Wikipedia

    en.wikipedia.org/wiki/ISO_5775

    ISO 5775 is an international standard for labeling the size of bicycle tires and rims. The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO). It is designed to make tire sizing consistent and clear. It replaces overlapping informal systems that ambiguously distinguished between sizes.

  3. 29er (bicycle) - Wikipedia

    en.wikipedia.org/wiki/29er_(bicycle)

    The 650B size, also known as 27.5″, reappeared in 2007 [6] as a compromise between the 26 inch and 29 inch sizes. The 650B size is called 27.5″. [7] The name "29er" comes from a bicycle called the Two Niner, which was offered by the Fisher bike company in 2001, according to 1998 Mountain Bike Hall of Fame inductee Don Cook. [8]

  4. Gear inches - Wikipedia

    en.wikipedia.org/wiki/Gear_inches

    This is equivalent to doubling the size of the drive wheel; that is, it is like a directly driven bicycle with a 52-inch wheel. That gear is said to be "52 gear inches." A bicycle with a 26-inch wheel, a 48-tooth chainring, and a cassette with gears ranging from 11 to 34 teeth has a lowest gear of 26 × 48 / 34 = 37 gear inches and a highest ...

  5. Thinking of Buying a Used Bike? Here’s How to Know If It Will ...

    www.aol.com/lifestyle/thinking-buying-used-bike...

    Check out this guide before you buy to make sure that new-to-you bike will fit you properly. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ...

  6. European Tyre and Rim Technical Organisation - Wikipedia

    en.wikipedia.org/wiki/European_Tyre_and_Rim...

    The European Tyre and Rim Technical Organisation (ETRTO) exists to specify and harmonise sizes of rims and their associated pneumatic tyres across the European Union.ETRTO sizes apply to rims and tyres for vehicles of all types, including bicycles.

  7. 27.5 mountain bike - Wikipedia

    en.wikipedia.org/wiki/27.5_Mountain_bike

    The wheel size is sometimes erroneously called "650B" [8] [9] as a "marketing term" by some manufacturers for their 27.5", but the 650B size has traditionally been a designation for a 26 inch diameter (ISO ~ 40-584 demi-ballon tire) using the same ISO 584 mm rim [10] used by French tandems, Porteurs and touring bicycles.

  8. Bicycle gearing - Wikipedia

    en.wikipedia.org/wiki/Bicycle_gearing

    In the case of road bikes, this is usually around 670 mm. A 700c "standard" wheel has a 622 mm rim diameter. The final wheel diameter depends on the specific tire but will be approximately 622 mm plus twice the tire width. Front/rear measurement only considers the sizes of a chainring and a rear sprocket. Gear inches and metres of development ...

  9. AOL

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    The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.