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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.
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]
Most road and racing bicycles today use 622 mm diameter (700C) rims, though 650C rims are popular with smaller riders and triathletes. The 650C size has the ISO diameter size of 571 mm. Size 650B is 584 mm and 650A is 590 mm. 650B is being promoted as a 'best of both worlds' size for mountain biking. [41]
Georgia Public Broadcasting (GPB) is a state network of PBS member television stations and NPR member radio stations serving the U.S. state of Georgia.It is operated by the Georgia Public Telecommunications Commission, an agency of the Georgia state government which holds the licenses for most of the PBS and NPR member stations licensed in the state.
Pennsylvania (/ ˌ p ɛ n s ɪ l ˈ v eɪ n i ə / ⓘ PEN-sil-VAY-nee-ə, lit. ' Penn's forest country '), officially the Commonwealth of Pennsylvania [b] (Pennsylvania Dutch: Pennsilfaani), [7] is a U.S. state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States.