27.5 mountain bike

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Merida Big Seven mountain bike with Schwalbe Racing Ralph 27.5″ tires

27.5 mountain bikes are mountain bikes which use a large volume tire that is approximately 27.5 inches in diameter, 56 mm wide (ISO 56-584 / 27.5 × 2.25) on an ISO 584 mm rim.[1][2][3][4][5] 27.5 mountain bikes are also called tweeners,[6] since it "fits between" the traditional 26-inch wheels and the newer 29ers".[7]

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.[3][8][11]

The 27.5 inch are seen as a compromise between the two existing standards of the original 26 inch (ISO 559 mm rim) and recently emerged 29 inch (ISO 622 mm rim) mountain bikes (late 2000s).

History[edit]

In 2007, 27.5 inch wheels for mountain bike use was popularized by Kirk Pacenti,[6][12] and in 2013 at least 10 companies had launched models with 27.5 inch wheels,[3] with some parts manufacturers following suit.[1][4]

In 2012, Nino Schurter won the World Cup event at Pietermaritzburg, South Africa,[5] and placed second in the Olympics in 2012 on 27.5 inch wheels.[2]

In 2022, author Paul Tuthill at Conquer The Bike stated that 27.5 inch wheels were "all but dead, [but] still remains on life support", with 29ers being more common for downhill and endurance riding, and 26ers being more popular for regular bike riding, mountain biking and dirt jumping.[13]

See also[edit]

References[edit]

  1. ^ a b Michael Frank (April 16, 2013). "The New Mountain Bike Revolution: 27.5-Inch Wheels". Adventure Journal. Archived from the original on 2013-05-20. Retrieved 2013-05-12.
  2. ^ a b Lennard Zinn (April 24, 2013). "Back to 27.5". VeloNews. Retrieved 2013-05-12.
  3. ^ a b c Matt Phillips (2013). "Reviewed: 27.5 Mountain Bikes for All Trails". Mountain Bike. Archived from the original on 2013-05-09. Retrieved 2013-05-12.
  4. ^ a b Vernon Felton (2013). "Ready or Not, Here Comes 650". Bike Magazine. Retrieved 2013-05-12.
  5. ^ a b Josh Patterson (Oct 9, 2012). "650b mountain bike wheels: looking at the trends". BikeRadar.com. Retrieved 2013-04-19.
  6. ^ a b Josh Patterson (2012-03-22). "Catching Up With: Kirk Pacenti". Dirt Rag. Archived from the original on 2013-09-18. Retrieved 2013-07-05.
  7. ^ What Is a 27.5 Bike? | 27.5 & 650b MTBs Explained
  8. ^ a b Sheldon Brown (December 6, 2012). "Tire Sizing Systems". Retrieved 2013-04-10.
  9. ^ "The 650B Wheel Renaissance". RideYourBike.com. Retrieved 2013-04-10.
  10. ^ www.rideyourbike.com There is a common misconception that 27.5 refers to the diameter of the wheel. It does not, it refers to the approximate diameter of a tire mounted on the 584 mm diameter wheel. 584 mm = 22.99″. The 650B Wheel Renaissance - Retrieved 2017-02-23.
  11. ^ www.bicyclequarterly.com Inside news from Bicycle Quarterly and Compass Bicycles - The Porteurs of Paris - Retrieved 2017-02-23.
  12. ^ James Huang (March 4, 2013). "NAHBS 2013: Kirk Pacenti's eecranks". Cyclingnews. Retrieved 2013-07-05.
  13. ^ Are 27.5 Wheels Dead? (Who Uses Them Anymore) - Conquer The Bike
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