{"id":345,"date":"2026-09-17T07:16:53","date_gmt":"2026-09-17T05:16:53","guid":{"rendered":"https:\/\/semqapps.com\/darkspeed\/hr\/kalkulator-prijenosa"},"modified":"2026-09-17T07:30:00","modified_gmt":"2026-09-17T05:30:00","slug":"kalkulator-prijenosa","status":"publish","type":"page","link":"https:\/\/semqapps.com\/darkspeed\/hr\/kalkulator-prijenosa","title":{"rendered":"Kalkulator prijenosa za bicikl"},"content":{"rendered":"<p>Odaberite prednji lan\u010danik, stra\u017enji lan\u010danik i gumu, a kalkulator ispod re\u0107i \u0107e vam tri stvari o tom prijenosu: koliko je brz pri zadanoj kadenci, koliko ima in\u010da prijenosa i koliko metara vas doista pomakne jedan okret pogona. Sve se prera\u010dunava dok tipkate.<\/p>\n<div class=\"calc\" data-imperial=\"1\" data-unit=\"mph\" data-decimal=\".\">\n  <h2 class=\"calc-title\" id=\"darkspeed-calculator\"><a href=\"https:\/\/semqapps.com\/darkspeed\/bike-gear-ratio-calculator\">Cadence and gearing calculator<\/a><\/h2>\n  <p class=\"calc-lead\">Set your gear and your cadence, then read off the speed. Everything updates as you type.<\/p>\n\n  <div class=\"calc-grid\">\n    <label class=\"calc-field\">\n      <span class=\"calc-label\">Cadence<\/span>\n      <span class=\"calc-input\">\n        <input type=\"number\" id=\"calc-cadence\" value=\"90\" min=\"20\" max=\"200\" step=\"1\" inputmode=\"numeric\" \/>\n        <span class=\"calc-suffix\">rpm<\/span>\n      <\/span>\n    <\/label>\n\n    <label class=\"calc-field\">\n      <span class=\"calc-label\">Chainring<\/span>\n      <span class=\"calc-input\">\n        <input type=\"number\" id=\"calc-chainring\" value=\"50\" min=\"20\" max=\"60\" step=\"1\" inputmode=\"numeric\" \/>\n        <span class=\"calc-suffix\">T<\/span>\n      <\/span>\n    <\/label>\n\n    <label class=\"calc-field\">\n      <span class=\"calc-label\">Sprocket<\/span>\n      <span class=\"calc-input\">\n        <input type=\"number\" id=\"calc-cog\" value=\"17\" min=\"9\" max=\"52\" step=\"1\" inputmode=\"numeric\" \/>\n        <span class=\"calc-suffix\">T<\/span>\n      <\/span>\n    <\/label>\n\n    <label class=\"calc-field\">\n      <span class=\"calc-label\">Wheel and tire<\/span>\n      <span class=\"calc-input\">\n        <select id=\"calc-wheel\">\n                    <option value=\"700x23c\"\n                  data-circ=\"2099\"\n                  >700 \u00d7 23C<\/option>\n                    <option value=\"700x25c\"\n                  data-circ=\"2111\"\n                   selected='selected'>700 \u00d7 25C<\/option>\n                    <option value=\"700x28c\"\n                  data-circ=\"2130\"\n                  >700 \u00d7 28C<\/option>\n                    <option value=\"700x32c\"\n                  data-circ=\"2155\"\n                  >700 \u00d7 32C<\/option>\n                    <option value=\"700x38c\"\n                  data-circ=\"2193\"\n                  >700 \u00d7 38C<\/option>\n                    <option value=\"29x2.25\"\n                  data-circ=\"2312\"\n                  >29 \u00d7 2.25<\/option>\n                    <option value=\"650bx47\"\n                  data-circ=\"2130\"\n                  >650B \u00d7 47 (27.5 \u00d7 1.85)<\/option>\n                    <option value=\"27.5x2.1\"\n                  data-circ=\"2168\"\n                  >27.5 \u00d7 2.10<\/option>\n                    <option value=\"26x2.1\"\n                  data-circ=\"2089\"\n                  >26 \u00d7 2.10<\/option>\n                    <option value=\"20x1.75\"\n                  data-circ=\"1552\"\n                  >20 \u00d7 1.75<\/option>\n                  <\/select>\n      <\/span>\n    <\/label>\n  <\/div>\n\n  <p class=\"calc-result\">\n    <output id=\"calc-out\" for=\"calc-cadence calc-chainring calc-cog calc-wheel\">\n      <strong id=\"calc-speed\">20.8<\/strong>\n      <span class=\"calc-unit\">mph<\/span>\n    <\/output>\n  <\/p>\n\n  <ul class=\"calc-secondary\">\n    <li>\n      <span class=\"calc-sec-label\">Gear inches<\/span>\n      <span class=\"calc-sec-value\" id=\"calc-inches\">77.8<\/span>\n    <\/li>\n    <li>\n      <span class=\"calc-sec-label\">Distance per pedal turn<\/span>\n      <span class=\"calc-sec-value\"><span id=\"calc-dev\">6.2<\/span> m<\/span>\n    <\/li>\n    <li>\n      <span class=\"calc-sec-label\">Rolling circumference<\/span>\n      <span class=\"calc-sec-value\"><span id=\"calc-circ\">2111<\/span> mm<\/span>\n    <\/li>\n  <\/ul>\n\n  <h3 class=\"calc-table-title\">The same gear at other cadences<\/h3>\n  <div class=\"calc-table-wrap\">\n    <table class=\"calc-table\">\n      <thead>\n        <tr>\n          <th scope=\"col\">Cadence<\/th>\n          <th scope=\"col\">mph<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody id=\"calc-rows\">\n                <tr>\n          <td>60 rpm<\/td>\n          <td>13.9<\/td>\n        <\/tr>\n                <tr>\n          <td>70 rpm<\/td>\n          <td>16.2<\/td>\n        <\/tr>\n                <tr>\n          <td>80 rpm<\/td>\n          <td>18.5<\/td>\n        <\/tr>\n                <tr>\n          <td>90 rpm<\/td>\n          <td>20.8<\/td>\n        <\/tr>\n                <tr>\n          <td>100 rpm<\/td>\n          <td>23.1<\/td>\n        <\/tr>\n                <tr>\n          <td>110 rpm<\/td>\n          <td>25.5<\/td>\n        <\/tr>\n              <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p class=\"calc-note\">The circumference is worked out from the ISO size printed on the tire wall: \u03c0 \u00d7 (rim diameter + twice the tire width). That runs about one percent above the tables built into bike computers, because a loaded tire is not a circle. For an exact figure, mark the valve, roll the bike forward one full turn with your weight on it, and measure the distance.<\/p>\n<\/div>\n<h2 id=\"kako-se-to-racuna\">Kako se to ra\u010duna<\/h2>\n<p>Bicikl nema mjenja\u010d u automobilskom smislu. Ono \u0161to mijenjate pri promjeni stupnja prijenosa jest omjer dvaju zup\u010danika, a sve ostalo iz njega slijedi aritmeti\u010dki. Nema skrivenog faktora i ni\u0161ta se ne gubi: sve stane u jedan redak.<\/p>\n<p>Va\u0161 prijenos je jednostavno prednji lan\u010danik podijeljen stra\u017enjim. Pedeset zubaca sprijeda prema sedamnaest straga daje 2,94, \u0161to zna\u010di da se stra\u017enji kota\u010d okrene 2,94 puta na svaki okret pogona. Pomno\u017eite to s putem koji kota\u010d prije\u0111e u jednom okretu i s brojem okreta pogona u minuti, i imate svoju brzinu.<\/p>\n<p><strong>brzina = kadenca \u00d7 (prednji lan\u010danik \u00f7 stra\u017enji) \u00d7 opseg kotrljanja<\/strong><\/p>\n<p>Jedina veli\u010dina koja nije ispisana na biciklu jest ova posljednja, a nju kalkulator izvodi umjesto vas iz mjere gume.<\/p>\n<h2 id=\"inci-prijenosa-i-put-po-okretu-pogona\">In\u010di prijenosa i put po okretu pogona<\/h2>\n<p>Goli omjer 2,94 sam po sebi ne govori ni\u0161ta jer zanemaruje kota\u010d. Isti omjer na brdskom biciklu s naplatcima od 26 in\u010da i na cestovnom 700C daje dva osjetno razli\u010dita prijenosa. Zato biciklisti uspore\u0111uju prijenose u jedinicama koje kota\u010d ve\u0107 sadr\u017ee.<\/p>\n<p>In\u010di prijenosa stariji su od dvoje: promjer koji bi trebao velociped s izravnim pogonom da na jedan pritisak pedale prije\u0111e jednako daleko. Na prvi pogled muzejski, a i dalje broj koji svi navode, jer \u010dini dva bicikla s razli\u010ditim kota\u010dima izravno usporedivima. Put po okretu pogona govori isto u metrima i lak\u0161e se zami\u0161lja: prijenos od 78 in\u010da pomakne vas za otprilike 6,2 metra na svaki puni okret pogona.<\/p>\n<h2 id=\"kako-tocno-izmjeriti-opseg-kotrljanja\">Kako to\u010dno izmjeriti opseg kotrljanja<\/h2>\n<p>Kalkulator izvodi opseg iz ISO mjere utisnute u bok gume: \u03c0 \u00d7 (promjer naplatka + dvostruka \u0161irina gume). Guma 700 \u00d7 25C je ISO 25-622, pa \u03c0 \u00d7 (622 + 50) daje 2111 mm. To je prozirno i provjerljivo, \u0161to se za tablice ugra\u0111ene u ve\u0107inu biciklisti\u010dkih ra\u010dunala ne mo\u017ee re\u0107i: me\u0111usobno se razlikuju i ne navode izvor.<\/p>\n<p>Ujedno je i oko jedan posto previsoko, jer guma s voza\u010dem na sebi nije kru\u017enica. \u017delite li pravi broj, izmjerite ga kotrljanjem: ozna\u010dite ventil dolje, sjednite na bicikl, pomaknite se naprijed dok ventil opet ne bude dolje i izmjerite izme\u0111u dviju oznaka. Ponovite tri puta i uprosje\u010dite. To jedno mjerenje pobje\u0111uje svaku tablicu, a ujedno je i vrijednost koju ima smisla unijeti u ra\u010dunalo da bi njegove udaljenosti bile to\u010dne.<\/p>\n<h2 id=\"sest-prijenosa-izracunatih\">\u0160est prijenosa, izra\u010dunatih<\/h2>\n<p>Svih \u0161est s gumom 700 \u00d7 25C, dakle s opsegom 2111 mm. Brzine ra\u010dunaju s 90 rpm, kadencom koju ve\u0107ina odr\u017ei na ravnom.<\/p>\n<table>\n<thead>\n<tr>\n<th>Prijenos<\/th>\n<th>\u010cemu slu\u017ei<\/th>\n<th>In\u010di prijenosa<\/th>\n<th>Put po okretu pogona<\/th>\n<th>km\/h pri 90 rpm<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>34 \/ 28<\/td>\n<td>Strm uspon<\/td>\n<td>32,1<\/td>\n<td>2,6 m<\/td>\n<td>13,8<\/td>\n<\/tr>\n<tr>\n<td>34 \/ 21<\/td>\n<td>Valovit teren<\/td>\n<td>42,8<\/td>\n<td>3,4 m<\/td>\n<td>18,5<\/td>\n<\/tr>\n<tr>\n<td>50 \/ 17<\/td>\n<td>Vo\u017enja po ravnom<\/td>\n<td>77,8<\/td>\n<td>6,2 m<\/td>\n<td>33,5<\/td>\n<\/tr>\n<tr>\n<td>50 \/ 14<\/td>\n<td>Brza vo\u017enja u skupini<\/td>\n<td>94,5<\/td>\n<td>7,5 m<\/td>\n<td>40,7<\/td>\n<\/tr>\n<tr>\n<td>50 \/ 11<\/td>\n<td>Sprint<\/td>\n<td>120,2<\/td>\n<td>9,6 m<\/td>\n<td>51,8<\/td>\n<\/tr>\n<tr>\n<td>42 \/ 16<\/td>\n<td>Tipi\u010dan jednobrzinac<\/td>\n<td>69,4<\/td>\n<td>5,5 m<\/td>\n<td>29,9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"koja-kadenca-uz-koji-prijenos\">Koja kadenca uz koji prijenos<\/h2>\n<p>Kalkulator \u0107e vam rado re\u0107i da je 50 \u00d7 11 pri 110 rpm 63 km\/h. Ne\u0107e vam re\u0107i da to gotovo nitko ne odr\u017eava, i upravo tu kalkulator prijenosa prestaje biti dovoljan. Koji prijenos mo\u017eete okretati ograni\u010dava snaga koju imate, a kadenca odlu\u010duje dolazi li ta snaga iz mi\u0161i\u0107ne sile ili iz srca i plu\u0107a.<\/p>\n<p>Ukratko: za ve\u0107inu je koristan raspon od 70 do 100 rpm, a pravi prijenos onaj je koji vas u njemu zadr\u017ei na terenu kojim vozite. Na\u0111ete li se na usponu ispod 70 rpm, odgovor je lak\u0161i prijenos, a ne ve\u0107i napor. <a href=\"https:\/\/semqapps.com\/darkspeed\/hr\/kadenca-biciklizam\">Vodi\u010d o kadenci<\/a> obra\u0111uje te raspone, ono \u0161to su istra\u017eivanja doista izmjerila i tri treninga za njihovo \u0161irenje.<\/p>\n<h2 id=\"cesta-pitanja\">\u010cesta pitanja<\/h2>\n<p><strong>Koji je prijenos dobar za cestovni bicikl?<\/strong> Za op\u0107u vo\u017enju pogon 50\/34 s kasetom 11-32 pokriva gotovo sve: oko 28 in\u010da dolje za strme uspone i oko 120 gore za spustove.<\/p>\n<p><strong>\u0160to su in\u010di prijenosa?<\/strong> Promjer kota\u010da koji bi trebao bicikl s izravnim pogonom da na jedan pritisak pedale prije\u0111e istu udaljenost. Na\u010din usporedbe prijenosa izme\u0111u bicikala s razli\u010ditim veli\u010dinama kota\u010da.<\/p>\n<p><strong>Kako izra\u010dunati brzinu iz kadence i prijenosa?<\/strong> Pomno\u017eite kadencu omjerom prijenosa i opsegom kotrljanja. Pri 90 rpm s 50\/17 i kota\u010dem od 2111 mm dobiva se 33,5 km\/h.<\/p>\n<p><strong>Mijenja li \u0161irina gume moj prijenos?<\/strong> Neznatno. Prelazak s 25 mm na 32 mm dodaje oko 44 mm opsega, \u0161to je otprilike dva posto ve\u0107a brzina pri istoj kadenci i istom prijenosu.<\/p>\n<p><strong>Koji opseg unijeti u biciklisti\u010dko ra\u010dunalo?<\/strong> Onaj koji izmjerite kotrljanjem bicikla sa svojom te\u017einom na njemu. Tabli\u010dne vrijednosti obi\u010dno su jedan posto optimisti\u010dne, \u0161to na 40 km iznosi oko 400 metara.<\/p>\n<p><strong>Je li te\u017ei prijenos uvijek br\u017ei?<\/strong> Samo ako ga jo\u0161 uvijek mo\u017eete okretati pri razumnoj kadenci. Prijenos koji gnje\u010dite pri 55 rpm daje dugoro\u010dno manje snage od lak\u0161eg okretanog pri 90.<\/p>\n<p><strong>Koju kadencu tra\u017eiti?<\/strong> Ve\u0107ini najbolje odgovara raspon od 70 do 100 rpm, pri \u010demu je oko 90 rpm naj\u010de\u0161\u0107e navo\u0111ena referentna vrijednost.<\/p>\n<aside class=\"ds-cta ds-cta--band\" id=\"get\"\t       data-cta-tag=\"page\"\n\t       aria-labelledby=\"ds-cta-1\">\n\t\t<h2 class=\"ds-cta-title\" id=\"ds-cta-1\">\n\t\t\tMount it. Ride it. <span class=\"text-cyan\">Read it at a glance.<\/span>\t\t<\/h2>\n\t\t\t\t<p class=\"ds-cta-lead\">DarkSpeed is a focused, distraction-free bike speedometer for iOS and Android.<\/p>\n\t\t\t\t    <div class=\"store-buttons\" data-placement=\"article_page\">\n      <a class=\"store-btn store-btn--apple\" href=\"https:\/\/apps.apple.com\/us\/app\/darkspeed-bike-speedometer\/id6780020629?pt=129025072&#038;ct=darkspeed_www&#038;mt=8\">\n        <svg class=\"store-icon\" viewBox=\"0 0 24 24\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M17.564 12.625c-.022-2.244 1.832-3.318 1.916-3.371-1.044-1.526-2.667-1.735-3.245-1.76-1.382-.14-2.694.812-3.395.812-.7 0-1.78-.79-2.926-.768-1.506.022-2.894.874-3.668 2.22-1.564 2.71-.4 6.722 1.124 8.927.745 1.08 1.633 2.293 2.799 2.25 1.124-.046 1.55-.726 2.91-.726 1.36 0 1.742.726 2.93.703 1.21-.022 1.976-1.1 2.717-2.184.856-1.252 1.21-2.466 1.232-2.528-.027-.012-2.367-.91-2.394-3.575zm-2.225-6.575c.62-.752 1.04-1.798.926-2.844-.896.036-1.984.595-2.625 1.346-.575.666-1.078 1.733-.943 2.756 1 .078 2.022-.508 2.642-1.258z\"\/><\/svg>\n        <span>\n          <small>Download on the<\/small>\n          <strong>App Store<\/strong>\n        <\/span>\n      <\/a>\n      <a class=\"store-btn store-btn--google\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.darkspeed.app&#038;referrer=utm_source%3Dsemqapps.com%26utm_medium%3Dreferral%26utm_campaign%3Ddarkspeed_www%26utm_content%3Den%26utm_term%3Dpage\">\n        <svg class=\"store-icon\" viewBox=\"0 0 24 24\" aria-hidden=\"true\">\n          <path fill=\"#34A853\" d=\"M3 20.5V3.5c0-.4.1-.7.3-1l10 10-10 10c-.2-.3-.3-.6-.3-1z\"\/>\n          <path fill=\"#FBBC04\" d=\"M16.8 12L20.4 9.9c.8.5 1.3 1.2 1.3 2.1s-.5 1.6-1.3 2.1L16.8 12z\"\/>\n          <path fill=\"#EA4335\" d=\"M13.3 12.5l3.5 3.5-12 6.7c-.5.3-1 .2-1.5-.2l10-10z\"\/>\n          <path fill=\"#4285F4\" d=\"M13.3 11.5L3.3 1.5c.5-.4 1-.5 1.5-.2l12 6.7-3.5 3.5z\"\/>\n        <\/svg>\n        <span>\n          <small>GET IT ON<\/small>\n          <strong>Google Play<\/strong>\n        <\/span>\n      <\/a>\n    <\/div>\n    \t<\/aside>\n","protected":false},"excerpt":{"rendered":"<p>Izra\u010dunajte brzinu, in\u010de prijenosa i put po okretu pogona iz lan\u010danika i gume. \u0160est uobi\u010dajenih prijenosa i kako to\u010dno izmjeriti opseg kota\u010da.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":65,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-345","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/comments?post=345"}],"version-history":[{"count":1,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/345\/revisions"}],"predecessor-version":[{"id":399,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/345\/revisions\/399"}],"up":[{"embeddable":true,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/65"}],"wp:attachment":[{"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/media?parent=345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}