{"id":354,"date":"2026-09-17T07:16:57","date_gmt":"2026-09-17T05:16:57","guid":{"rendered":"https:\/\/semqapps.com\/darkspeed\/ro\/calculator-rapoarte"},"modified":"2026-09-17T07:30:05","modified_gmt":"2026-09-17T05:30:05","slug":"calculator-rapoarte","status":"publish","type":"page","link":"https:\/\/semqapps.com\/darkspeed\/ro\/calculator-rapoarte","title":{"rendered":"Calculator de rapoarte pentru biciclet\u0103"},"content":{"rendered":"<p>Alege\u021bi foaia, pinionul \u0219i anvelopa, iar calculatorul de mai jos v\u0103 spune trei lucruri despre acel raport: c\u00e2t de repede merge la o caden\u021b\u0103 dat\u0103, c\u00e2\u021bi inchi de dezvoltare are \u0219i c\u00e2t v\u0103 duce de fapt o rota\u021bie complet\u0103 de pedalier. Totul se recalculeaz\u0103 \u00een timp ce scrie\u021bi.<\/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=\"cum-se-face-calculul\">Cum se face calculul<\/h2>\n<p>O biciclet\u0103 nu are cutie de viteze \u00een sensul automobilistic. Ceea ce schimba\u021bi c\u00e2nd schimba\u021bi viteza este un raport \u00eentre dou\u0103 ro\u021bi din\u021bate, iar tot restul decurge de acolo aritmetic. Nu exist\u0103 niciun factor ascuns \u0219i nu se pierde nimic: totul \u00eencape pe un r\u00e2nd.<\/p>\n<p>Raportul dumneavoastr\u0103 este pur \u0219i simplu foaia \u00eemp\u0103r\u021bit\u0103 la pinion. O foaie de 50 de din\u021bi fa\u021b\u0103 de un pinion de 17 d\u0103 2,94, adic\u0103 roata din spate se \u00eenv\u00e2rte de 2,94 ori la fiecare rota\u021bie de pedalier. \u00cenmul\u021bi\u021bi asta cu distan\u021ba pe care roata o parcurge \u00eentr-o rota\u021bie \u0219i cu num\u0103rul de rota\u021bii de pedalier pe minut, \u0219i ave\u021bi viteza.<\/p>\n<p><strong>vitez\u0103 = caden\u021b\u0103 \u00d7 (foaie \u00f7 pinion) \u00d7 circumferin\u021b\u0103 de rulare<\/strong><\/p>\n<p>Singurul termen care nu este scris pe biciclet\u0103 este ultimul, iar calculatorul \u00eel deduce pentru dumneavoastr\u0103 din dimensiunea anvelopei.<\/p>\n<h2 id=\"inchi-de-dezvoltare-si-distanta-pe-o-rotatie-de-pedalier\">Inchi de dezvoltare \u0219i distan\u021ba pe o rota\u021bie de pedalier<\/h2>\n<p>Un raport gol de 2,94 nu spune nimic \u00een sine, pentru c\u0103 ignor\u0103 roata. Acela\u0219i raport pe o biciclet\u0103 de munte de 26 de inchi \u0219i pe una de \u0219osea 700C d\u0103 dou\u0103 rapoarte vizibil diferite. De aceea ciclistii compar\u0103 rapoartele \u00een unit\u0103\u021bi care includ deja roata.<\/p>\n<p>Inchii de dezvoltare sunt cei mai vechi dintre cele dou\u0103: diametrul de care ar avea nevoie un biciclu cu transmisie direct\u0103 pentru a rula la fel de departe la o ap\u0103sare de pedal\u0103. Pare de muzeu la prima vedere \u0219i r\u0103m\u00e2ne totu\u0219i num\u0103rul pe care toat\u0103 lumea \u00eel citeaz\u0103, pentru c\u0103 face dou\u0103 biciclete cu ro\u021bi diferite direct comparabile. Distan\u021ba pe o rota\u021bie de pedalier spune acela\u0219i lucru \u00een metri \u0219i se imagineaz\u0103 mai u\u0219or: un raport de 78 de inchi v\u0103 mut\u0103 cu aproximativ 6,2 metri la fiecare rota\u021bie complet\u0103 de pedalier.<\/p>\n<h2 id=\"cum-masurati-exact-circumferinta-de-rulare\">Cum m\u0103sura\u021bi exact circumferin\u021ba de rulare<\/h2>\n<p>Calculatorul deduce circumferin\u021ba din dimensiunea ISO imprimat\u0103 pe flancul anvelopei: \u03c0 \u00d7 (diametrul jantei + de dou\u0103 ori l\u0103\u021bimea anvelopei). O anvelop\u0103 700 \u00d7 25C este ISO 25-622, deci \u03c0 \u00d7 (622 + 50) d\u0103 2111 mm. Este transparent \u0219i verificabil, ceea ce nu se poate spune despre tabelele integrate \u00een majoritatea ciclocomputerelor: difer\u0103 \u00eentre ele \u0219i nu citeaz\u0103 nicio surs\u0103.<\/p>\n<p>Este de asemenea cu circa un procent prea mare, pentru c\u0103 o anvelop\u0103 cu un ciclist deasupra nu este un cerc. Dac\u0103 vre\u021bi num\u0103rul real, face\u021bi proba de rulare: marca\u021bi valva jos, urca\u021bi pe biciclet\u0103, rula\u021bi \u00eenainte p\u00e2n\u0103 c\u00e2nd valva ajunge din nou jos \u0219i m\u0103sura\u021bi \u00eentre cele dou\u0103 semne. Repeta\u021bi de trei ori \u0219i face\u021bi media. Aceast\u0103 singur\u0103 m\u0103sur\u0103toare bate orice tabel \u0219i este totodat\u0103 num\u0103rul de introdus \u00een ciclocomputer pentru ca distan\u021bele lui s\u0103 fie corecte.<\/p>\n<h2 id=\"sase-rapoarte-calculate\">\u0218ase rapoarte, calculate<\/h2>\n<p>Toate \u0219ase cu anvelop\u0103 700 \u00d7 25C, deci cu 2111 mm circumferin\u021b\u0103. Vitezele presupun 90 rpm, o caden\u021b\u0103 pe care majoritatea o men\u021bin pe plat.<\/p>\n<table>\n<thead>\n<tr>\n<th>Raport<\/th>\n<th>La ce folose\u0219te<\/th>\n<th>Inchi de dezvoltare<\/th>\n<th>Distan\u021ba pe o rota\u021bie de pedalier<\/th>\n<th>km\/h la 90 rpm<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>34 \/ 28<\/td>\n<td>Urcare abrupt\u0103<\/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>Teren v\u0103lurit<\/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>Rulaj pe plat<\/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>Ie\u0219ire rapid\u0103 \u00een grup<\/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>Monovitez\u0103 tipic\u0103<\/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=\"ce-cadenta-la-ce-raport\">Ce caden\u021b\u0103 la ce raport<\/h2>\n<p>Calculatorul v\u0103 va spune bucuros c\u0103 50 \u00d7 11 la 110 rpm \u00eenseamn\u0103 63 km\/h. Nu v\u0103 va spune c\u0103 aproape nimeni nu poate sus\u021bine asta, \u0219i aici un calculator de rapoarte \u00eenceteaz\u0103 s\u0103 fie suficient. Raportul pe care reu\u0219i\u021bi s\u0103 \u00eel \u00eenv\u00e2rti\u021bi este limitat de puterea pe care o ave\u021bi, iar caden\u021ba decide dac\u0103 acea putere vine din for\u021ba muscular\u0103 sau din inim\u0103 \u0219i pl\u0103m\u00e2ni.<\/p>\n<p>Pe scurt: pentru majoritatea intervalul util este 70 p\u00e2n\u0103 la 100 rpm, iar raportul potrivit este cel care v\u0103 \u021bine acolo pe terenul pe care merge\u021bi. Dac\u0103 v\u0103 trezi\u021bi sub 70 rpm pe o urcare, r\u0103spunsul este un raport mai u\u0219or, nu un efort mai mare. <a href=\"https:\/\/semqapps.com\/darkspeed\/ro\/cadenta-ciclism\">Ghidul de caden\u021b\u0103<\/a> trateaz\u0103 intervalele, ce a m\u0103surat cu adev\u0103rat cercetarea \u0219i trei antrenamente pentru l\u0103rgirea lor.<\/p>\n<h2 id=\"intrebari-frecvente\">\u00centreb\u0103ri frecvente<\/h2>\n<p><strong>Ce raport este bun pentru o biciclet\u0103 de \u0219osea?<\/strong> Pentru rulaj general, un pedalier 50\/34 cu caset\u0103 11-32 acoper\u0103 aproape tot: \u00een jur de 28 de inchi jos pentru urc\u0103ri abrupte \u0219i \u00een jur de 120 sus pentru cobor\u00e2ri.<\/p>\n<p><strong>Ce sunt inchii de dezvoltare?<\/strong> Diametrul de roat\u0103 de care ar avea nevoie o biciclet\u0103 cu transmisie direct\u0103 pentru a parcurge aceea\u0219i distan\u021b\u0103 la o ap\u0103sare de pedal\u0103. Un mod de a compara rapoarte \u00eentre biciclete cu ro\u021bi de dimensiuni diferite.<\/p>\n<p><strong>Cum calculez viteza din caden\u021b\u0103 \u0219i raport?<\/strong> \u00cenmul\u021bi\u021bi caden\u021ba cu raportul \u0219i cu circumferin\u021ba de rulare. La 90 rpm cu 50\/17 \u0219i o roat\u0103 de 2111 mm rezult\u0103 33,5 km\/h.<\/p>\n<p><strong>L\u0103\u021bimea anvelopei \u00eemi schimb\u0103 raportul?<\/strong> U\u0219or. Trecerea de la 25 mm la 32 mm adaug\u0103 circa 44 mm de circumferin\u021b\u0103, adic\u0103 \u00een jur de dou\u0103 procente vitez\u0103 \u00een plus la aceea\u0219i caden\u021b\u0103 \u0219i acela\u0219i raport.<\/p>\n<p><strong>Ce circumferin\u021b\u0103 introduc \u00een ciclocomputer?<\/strong> Pe cea m\u0103surat\u0103 rul\u00e2nd bicicleta cu greutatea dumneavoastr\u0103 pe ea. Valorile din tabele sunt de obicei cu un procent optimiste, ceea ce \u00eenseamn\u0103 circa 400 de metri pe o tur\u0103 de 40 km.<\/p>\n<p><strong>Un raport mai mare este \u00eentotdeauna mai rapid?<\/strong> Doar dac\u0103 \u00eel mai pute\u021bi \u00eenv\u00e2rti la o caden\u021b\u0103 rezonabil\u0103. Un raport for\u021bat la 55 rpm produce mai pu\u021bin\u0103 putere sus\u021binut\u0103 dec\u00e2t unul mai u\u0219or \u00eenv\u00e2rtit la 90.<\/p>\n<p><strong>Ce caden\u021b\u0103 ar trebui s\u0103 urm\u0103resc?<\/strong> Majorit\u0103\u021bii \u00eei prie\u0219te cel mai bine \u00eentre 70 \u0219i 100 rpm, \u00een jur de 90 rpm fiind valoarea de referin\u021b\u0103 cel mai des citat\u0103.<\/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>Calcula\u021bi viteza, inchii de dezvoltare \u0219i distan\u021ba pe o rota\u021bie de pedalier din foaie, pinion \u0219i anvelop\u0103. \u0218ase rapoarte uzuale \u0219i m\u0103surarea exact\u0103 a ro\u021bii.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":81,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-354","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/354","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=354"}],"version-history":[{"count":1,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/354\/revisions"}],"predecessor-version":[{"id":408,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/354\/revisions\/408"}],"up":[{"embeddable":true,"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/pages\/81"}],"wp:attachment":[{"href":"https:\/\/semqapps.com\/darkspeed\/wp-json\/wp\/v2\/media?parent=354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}