Editing Countersteering (section)

{{Short description|Single-track vehicle steering technique}}
{{For|the technique with a similar name used in automobiles|Countersteering (Automobile)}}
{{Use dmy dates|date=June 2020}}
'''Countersteering''' is used by [[single-track vehicle]] operators, such as [[Cycling|cyclists]] and [[Motorcycling|motorcyclists]], to initiate a turn toward a given direction by momentarily steering counter to the desired direction ("steer left to turn right"). To negotiate a turn successfully, the combined [[center of mass]] of the rider and the single-track [[vehicle]] must first be leaned in the direction of the turn, and steering briefly in the opposite direction causes that lean.<ref>{{cite web
| url = http://sheldonbrown.com/gloss_cn-z.html#countersteering
| title = Countersteering
| author = Sheldon Brown
| author-link = Sheldon Brown (bicycle mechanic)
| quote =  "Countersteering" refers to the momentary motion of the handlebars in the opposite direction of the desired turn.
| access-date = 2012-11-09}}</ref> The rider's action of countersteering is sometimes referred to as "giving a steering command".<ref name="npra">{{cite book
| title = "Curriculum for driving licenses A1, A2 and A"/"Læreplan Førerkortklasse A1, A2 and A"
| page = 55
| year = 2013
| publisher = [[Norwegian Public Roads Administration]]
| url = http://www.vegvesen.no/_attachment/61093/binary/727765?fast_title=L%C3%A6replan+f%C3%B8rerkortklasse+A1%2C+A2+og+A+%28lett-%2C+mellomtung-++og+tung+motorsykkel%29.pdf
}}</ref><ref name="LeifKlyve">{{cite book
| url = http://arkiv.nmcu.org/kompetanse/full_kontroll_web.pdf
| title = Full Kontroll
| page = 15
| publisher = Norwegian Motorcycle Union
| author1 = Leif Klyve
| author2 = Henry Enoksen
| author3 = Gunnar Kubberød
| isbn = 82-92276-00-9
| archive-url = https://web.archive.org/web/20081008225628/http://arkiv.nmcu.org/kompetanse/full_kontroll_web.pdf
| archive-date = 8 October 2008}}</ref>{{rp|15}}

The scientific literature does not provide a clear and comprehensive definition of countersteering. In fact, "a proper distinction between steer torque and steer angle ... is not always made."<ref name="Sharp2008">{{cite journal
| journal = Applied Mechanics Reviews
| volume = 61
| issue = 6
| year = 2008
| pages = 1–24
| title = On the stability and control of the bicycle
| last = Sharp
| first = R. S.
| quote = A positive right-hand torque leads to negative steer and roll angles, corresponding to a left turn. This behavior is often called countersteering, and it appears that it was known in the very early days of cycling, although a proper distinction between steer torque and steer angle forcing is not always made.
| doi=10.1115/1.2983014
|bibcode = 2008ApMRv..61f0803S }}</ref>

[[Image:Perfectcornerbike.gif|thumb|290px|A hypothetical curve on dry asphalt]]