27.5 mountain bike
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]- ^ 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.
- ^ a b Lennard Zinn (April 24, 2013). "Back to 27.5". VeloNews. Retrieved 2013-05-12.
- ^ 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.
- ^ a b Vernon Felton (2013). "Ready or Not, Here Comes 650". Bike Magazine. Retrieved 2013-05-12.
- ^ a b Josh Patterson (Oct 9, 2012). "650b mountain bike wheels: looking at the trends". BikeRadar.com. Retrieved 2013-04-19.
- ^ 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.
- ^ What Is a 27.5 Bike? | 27.5 & 650b MTBs Explained
- ^ a b Sheldon Brown (December 6, 2012). "Tire Sizing Systems". Retrieved 2013-04-10.
- ^ "The 650B Wheel Renaissance". RideYourBike.com. Retrieved 2013-04-10.
- ^ 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.
- ^ www.bicyclequarterly.com Inside news from Bicycle Quarterly and Compass Bicycles - The Porteurs of Paris - Retrieved 2017-02-23.
- ^ James Huang (March 4, 2013). "NAHBS 2013: Kirk Pacenti's eecranks". Cyclingnews. Retrieved 2013-07-05.
- ^ Are 27.5 Wheels Dead? (Who Uses Them Anymore) - Conquer The Bike