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data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p><b>Steering ratio</b> refers to the ratio between the turn of the <a href="/wiki/Steering_wheel" title="Steering wheel">steering wheel</a> (in degrees) or handlebars and the turn of the wheels (in degrees).<sup id="cite_ref-Pacejka_1-0" class="reference"><a href="#cite_note-Pacejka-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>The steering ratio is the ratio of the number of degrees of turn of the steering wheel to the number of degrees the wheel(s) turn as a result. In <a href="/wiki/Motorcycle" title="Motorcycle">motorcycles</a>, <a href="/wiki/Tricycle" title="Tricycle">delta tricycles</a> and <a href="/wiki/Bicycle" title="Bicycle">bicycles</a>, the steering ratio is always 1:1, because the steering wheel is fixed to the front wheel. A steering ratio of x:y means that a turn of the steering wheel x degree(s) causes the wheel(s) to turn y degree(s). In most <a href="/wiki/Car" title="Car">passenger cars</a>, the ratio is between 12:1 and 20:1. For example, if one and a half turns of the steering wheel, 540 degrees, causes the inner & outer wheel to turn 35 and 30 degrees respectively, due to <a href="/wiki/Ackermann_steering_geometry" title="Ackermann steering geometry">Ackermann steering geometry</a>, the ratio is then 540:((35+30)/2) = 16.6:1. </p><p>A higher steering ratio means that the steering wheel is turned more to get the wheels turning, but it will be easier to turn the steering wheel. A lower steering ratio means that the steering wheel is turned less to get the wheels turning, but it will be harder to turn the steering wheel. Larger and heavier vehicles will often have a higher steering ratio, which will make the steering wheel easier to turn. If a truck had a low steering ratio, it would be very hard to turn the steering wheel. In normal and lighter cars, the wheels are easier to turn, so the steering ratio doesn't have to be as high. In race cars the ratio is typically very low, because the vehicle must respond to steering input much faster than in normal cars. The steering wheel is therefore harder to turn. </p> <div class="mw-heading mw-heading2"><h2 id="Variable-ratio_steering">Variable-ratio steering</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Steering_ratio&action=edit&section=1" title="Edit section: Variable-ratio steering"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Variable-ratio steering is a system that uses different ratios on the rack in a <a href="/wiki/Rack_and_pinion" title="Rack and pinion">rack and pinion</a> steering system. At the center of the rack, the space between the teeth are smaller and the space becomes larger as the pinion moves down the rack. In the middle of the rack there is a higher ratio and the ratio becomes lower as the steering wheel is turned towards lock. That makes the steering less sensitive when the steering wheel is close to its center position and makes it harder for the driver to <a href="/wiki/Over_steer" class="mw-redirect" title="Over steer">over steer</a> at high speeds. As the steering wheel is turned towards lock, the wheels begin to react more to steering input. </p> <div class="mw-heading mw-heading2"><h2 id="Steering_quickener">Steering quickener</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Steering_ratio&action=edit&section=2" title="Edit section: Steering quickener"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A steering quickener is used to modify the steering ratio of factory-installed steering system, which in turn modifies the response time and overall handling of vehicle. When a steering quickener is employed in an automobile, the driver of the automobile can turn the steering wheel a smaller degree compared to a factory-installed steering system without a steering quickener, to turn the vehicle through same distance.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> On the other hand, the steering effort needed will greatly increase. If the automobile is equipped with power steering, overloading the power steering pump can also be a concern.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Steering_ratio&action=edit&section=3" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Pacejka-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Pacejka_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFPacejka2006" class="citation book cs1"><a href="/wiki/Hans_B._Pacejka" title="Hans B. Pacejka">Pacejka, Hans B.</a> (2006). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=wHlkbBnu9FEC&q=steering+ratio"><i>Tire and Vehicle dynamics</i></a> (2nd ed.). SAE International. p. 10. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-7680-1702-1" title="Special:BookSources/978-0-7680-1702-1"><bdi>978-0-7680-1702-1</bdi></a><span class="reference-accessdate">. Retrieved <span class="nowrap">2009-03-31</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Tire+and+Vehicle+dynamics&rft.pages=10&rft.edition=2nd&rft.pub=SAE+International&rft.date=2006&rft.isbn=978-0-7680-1702-1&rft.aulast=Pacejka&rft.aufirst=Hans+B.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DwHlkbBnu9FEC%26q%3Dsteering%2Bratio&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASteering+ratio" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1">"Steer Quick with a Quick Steer". <i>Stock Car Racing</i>. April 22, 2005.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Stock+Car+Racing&rft.atitle=Steer+Quick+with+a+Quick+Steer&rft.date=2005-04-22&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASteering+ratio" class="Z3988"></span> <span class="cs1-visible-error citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_web" title="Template:Cite web">cite web</a>}}</code>: </span><span class="cs1-visible-error citation-comment">Missing or empty <code class="cs1-code">|url=</code> (<a href="/wiki/Help:CS1_errors#cite_web_url" title="Help:CS1 errors">help</a>)</span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">Sergei Grishin, <a rel="nofollow" class="external text" href="https://racingrebel.com/subaru-steering-quickener-installation/">"Subaru Steering Quickener Installation"</a>, <i>Racing Rebel</i>, Retrieved 2017-07-31</span> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Steering_ratio&oldid=1180961113">https://en.wikipedia.org/w/index.php?title=Steering_ratio&oldid=1180961113</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Engineering_ratios" title="Category:Engineering ratios">Engineering ratios</a></li><li><a href="/wiki/Category:Automotive_steering_technologies" title="Category:Automotive steering technologies">Automotive steering technologies</a></li><li><a href="/wiki/Category:Motorcycle_dynamics" title="Category:Motorcycle dynamics">Motorcycle dynamics</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden category: <ul><li><a href="/wiki/Category:CS1_errors:_requires_URL" title="Category:CS1 errors: requires URL">CS1 errors: requires URL</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 19 October 2023, at 23:10<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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