{"id":25192,"date":"2024-04-09T06:00:31","date_gmt":"2024-04-09T04:00:31","guid":{"rendered":"https:\/\/www.welovecycling.com\/cs\/?p=25192"},"modified":"2024-04-10T12:09:45","modified_gmt":"2024-04-10T10:09:45","slug":"sirsi-pneumatiky-a-nizsi-tlak-v-nich-vas-na-kole-zrychli-neverite","status":"publish","type":"post","link":"https:\/\/www.welovecycling.com\/cs\/2024\/04\/09\/sirsi-pneumatiky-a-nizsi-tlak-v-nich-vas-na-kole-zrychli-neverite\/","title":{"rendered":"\u0160ir\u0161\u00ed pneumatiky a ni\u017e\u0161\u00ed tlak v nich v\u00e1s na kole zrychl\u00ed. Nev\u011b\u0159\u00edte?"},"content":{"rendered":"<p><strong>Cyklisti\u010dt\u00ed purit\u00e1ni si musej\u00ed trhat posledn\u00ed vlasy z hlavy. Nejd\u0159\u00edv je zdeptaly kotou\u010dov\u00e9 brzdy. Pak elektronick\u00e9 \u0159azen\u00ed. A te\u010f je tu pro n\u011b dal\u0161\u00ed r\u00e1na. Zd\u00e1 se, \u017ee 23milimetrov\u00e9, tedy \u201etradi\u010dn\u00ed\u201c pl\u00e1\u0161t\u011b jsou definitivn\u011b odsouzeny do minulosti. Trend dne\u0161ka jsou \u0161ir\u0161\u00ed pneumatiky, do kter\u00fdch se hust\u00ed ni\u017e\u0161\u00ed tlak. A jak vid\u00edme dnes a denn\u011b, je to tak rychlej\u0161\u00ed!<\/strong><\/p>\n<p>Tohle se zd\u00e1 j\u00edt proti selsk\u00e9mu rozumu. \u0158ekli byste, \u017ee tvrd\u0161\u00ed a u\u017e\u0161\u00ed profil se bude to\u010dit rychleji a bude taky aerodynami\u010dt\u011bj\u0161\u00ed. D\u016fkazy a m\u011b\u0159en\u00ed v\u0161ak ukazuj\u00ed opak. Ale prr, ne\u017e vyb\u011bhnete koupit nov\u00e9 pl\u00e1\u0161t\u011b, je tu jeden chyt\u00e1k. Samotn\u00e9 pneumatiky v\u00e1s nezrychl\u00ed. To proto, \u017ee pl\u00e1\u0161t\u011b nefunguj\u00ed izolovan\u011b, ale mus\u00edme na n\u011b nahl\u00ed\u017eet jako na \u010d\u00e1st cel\u00e9ho syst\u00e9mu kola, m\u00edn\u011bno v\u00fdpletu.<\/p>\n<p>Tvar gumy, jakmile ji nasad\u00edme na r\u00e1fek a nafoukneme, je nejkriti\u010dt\u011bj\u0161\u00ed faktor ur\u010duj\u00edc\u00ed to, jak\u00e9 v\u00fdkony s n\u00ed budete p\u0159edv\u00e1d\u011bt. Rozm\u011bry r\u00e1fku (prim\u00e1rn\u011b jeho vnit\u0159n\u00ed \u0161\u00ed\u0159e) jsou nejpodstatn\u011bj\u0161\u00ed pro optimalizaci v\u00fdkonu pl\u00e1\u0161t\u011b.<\/p>\n<p>Pokud \u0161irok\u00fd pl\u00e1\u0161\u0165 nasad\u00edte na huben\u00fd r\u00e1fek, dopad na v\u00fdkon bude sp\u00ed\u0161e negativn\u00ed. Pl\u00e1\u0161\u0165 bude na sv\u00e9m okraji sk\u0159\u00edpnut\u00fd a kdy\u017e si p\u0159edstav\u00edte jeho pr\u016f\u0159ez, bude p\u0159ipom\u00ednat \u017e\u00e1rovku. Nebude tedy m\u00edt optim\u00e1ln\u00ed oporu v\u00a0r\u00e1fku a m\u016f\u017eete se na n\u011bm c\u00edtit nestabiln\u011b, bude se \u201e\u017emoulat\u201c. Takov\u00fd pocit zn\u00e1sob\u00ed to, pokud i tlak bude ni\u017e\u0161\u00ed. V\u00a0zat\u00e1\u010dk\u00e1ch nebude kolo dr\u017eet na podlo\u017ece.<\/p>\n<p><a href=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920.webp\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-25197\" src=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920.webp\" alt=\"\" width=\"1920\" height=\"1280\" srcset=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920.webp 1920w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920-300x200.webp 300w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920-1024x683.webp 1024w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920-768x512.webp 768w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920-1536x1024.webp 1536w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920-400x267.webp 400w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/cycling-races-3637139_1920-272x182.webp 272w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/a><\/p>\n<p>Naopak \u0161ir\u0161\u00ed r\u00e1fek umo\u017en\u00ed patk\u00e1m pl\u00e1\u0161t\u011b (to jsou ty tvrd\u00e9 okraje vypln\u011bn\u00e9 dr\u00e1tem nebo kevlarovou strunou) v\u011bt\u0161\u00ed rozte\u010d. Bo\u010dnice pl\u00e1\u0161t\u011b budou v\u00a0takov\u00e9m p\u0159\u00edpad\u011b rovn\u011bj\u0161\u00ed a jeho pr\u016f\u0159ez bude m\u00edt tvar p\u00edsmene U. To sou\u010dasn\u011b umo\u017en\u00ed vy\u0161\u0161\u00ed objem vzduchu v\u00a0pl\u00e1\u0161ti, dod\u00e1 mu to struktur\u00e1ln\u00ed stabilitu a zmen\u0161\u00ed riziko defektu i za\u00a0ni\u017e\u0161\u00edho tlaku. A co v\u00edc, znovu v rozporu s t\u00edm, co vel\u00ed logika, \u0161ir\u0161\u00ed tvar pneumatiky m\u016f\u017ee celkov\u011b zlep\u0161it aerodynamiku kol, zvl\u00e1\u0161t\u011b pokud vezmeme v \u00favahu stabilitu p\u0159i bo\u010dn\u00edm v\u011btru.<\/p>\n<h2><strong>Kdy\u017e \u017eiletka poskakuje<\/strong><\/h2>\n<p>Testy valiv\u00e9ho odporu jsou nezpochybniteln\u00e9 a je v\u0161eobecn\u011b zn\u00e1mo, \u017ee \u0161ir\u0161\u00ed pneumatiky maj\u00ed ve skute\u010dnosti ni\u017e\u0161\u00ed t\u0159en\u00ed p\u0159i stejn\u00e9m tlaku jako huben\u00e1 \u201e\u017eiletka\u201c. Je to proto, \u017ee kontaktn\u00ed plocha \u0161irok\u00e9 pneumatiky je krat\u0161\u00ed, \u0161ir\u0161\u00ed a kulat\u011bj\u0161\u00ed ve srovn\u00e1n\u00ed s del\u0161\u00edm, \u0161t\u00edhlej\u0161\u00edm eliptick\u00fdm tvarem vytvo\u0159en\u00fdm \u00fazkou pneumatikou. To zp\u016fsob\u00ed men\u0161\u00ed deformaci kostry pneumatiky p\u0159i jej\u00edm odvalov\u00e1n\u00ed a men\u0161\u00ed deformace znamen\u00e1 m\u00e9n\u011b pl\u00fdtv\u00e1n\u00ed energi\u00ed. Jin\u00fdmi slovy \u2013 men\u0161\u00ed valiv\u00fd odpor.<\/p>\n<p>Nam\u00edtnete mo\u017en\u00e1, \u017ee vy\u0161\u0161\u00ed tlak sni\u017euje deformaci pneumatiky a t\u00edm i energetick\u00e9 ztr\u00e1ty. Jist\u011b, ale to jen tehdy, pokud jezd\u00edme na dokonale hladk\u00e9m povrchu, jak\u00fdm je nap\u0159\u00edklad velodrom. Jakmile se na povrchu objev\u00ed sebemen\u0161\u00ed nerovnost, vysok\u00fd tlak v pneumatice se prom\u00edtne do mnoha necht\u011bn\u00fdch pohyb\u016f. Pneumatika bude vychylov\u00e1na nahoru a dol\u016f a do stran, co\u017e v\u0161e ub\u00edr\u00e1 na rychlosti pohybu vp\u0159ed.<\/p>\n<h2><strong>Bal\u00f3ny do Roubaix<\/strong><\/h2>\n<p>Jezdec a kolo p\u0159i ka\u017ed\u00e9 j\u00edzd\u011b naraz\u00ed na tis\u00edce men\u0161\u00edch \u010di v\u011bt\u0161\u00edch nerovnost\u00ed silnice. V\u011bt\u0161\u00ed objem vzduchu \u0161ir\u0161\u00ed pneumatiky v kombinaci s ni\u017e\u0161\u00edm tlakem pom\u00e1h\u00e1 pneumatice absorbovat tyto deformace, tak\u017ee se nep\u0159en\u00e1\u0161ej\u00ed na kola a jezdce. Sni\u017euj\u00ed se tak ztr\u00e1ty kinetick\u00e9 energie.<\/p>\n<p>P\u0159i pohledu do profi pelotonu vid\u00edme, \u017ee nejobl\u00edben\u011bj\u0161\u00ed pr\u016fm\u011br pl\u00e1\u0161\u0165\u016f se dnes pohybuje od 26 do 28 mm. V\u00a0extr\u00e9mn\u00edch p\u0159\u00edpadech, jak\u00fdm byla klasika Pa\u0159\u00ed\u017e-Roubaix, kter\u00e1 drnc\u00e1 od za\u010d\u00e1tku do konce, se pou\u017e\u00edvaj\u00ed bal\u00f3ny s\u00a0pr\u016fm\u011brem 30 i \u0161ir\u0161\u00ed.<\/p>\n<p><a href=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-scaled.webp\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-extra-large wp-image-25195\" src=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-1920x1280.webp\" alt=\"\" width=\"1920\" height=\"1280\" srcset=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-1920x1280.webp 1920w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-300x200.webp 300w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-1024x683.webp 1024w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-768x512.webp 768w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-1536x1024.webp 1536w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-2048x1365.webp 2048w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-400x267.webp 400w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-272x182.webp 272w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/13\/2024\/04\/4SC_0444-1920x1280.webp 1920w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/a><\/p>\n<p>Zat\u00edm to tedy vypad\u00e1, \u017ee pro b\u011b\u017en\u00e9ho smrteln\u00edka bude nejlep\u0161\u00ed volbou \u0161\u00ed\u0159e 28-30 mm, pokud jde o kombinaci v\u0161ech \u017e\u00e1douc\u00edch benefit\u016f. Co\u017e ale jist\u011b neznamen\u00e1, \u017ee to tak z\u016fstane nav\u017edy. V\u017edy\u0165 p\u0159ed dv\u011bma lety stejn\u00e1 debata prob\u00edhala kolem toho, jestli je 25 mm v\u00fdhodn\u011bj\u0161\u00edch ne\u017e 23 mm.<\/p>\n<p>Zd\u00e1 se tedy, \u017ee nade\u0161el \u010das vyhodit huben\u00e9 pl\u00e1\u0161t\u011b a zapomenout na zastarale vysok\u00e9 tlaky a p\u0159ijmout fakt, \u017ee v\u0161echny v\u00fdzkumy poukazuj\u00ed na jednu v\u011bc: \u0161ir\u0161\u00ed pl\u00e1\u0161\u0165 a ni\u017e\u0161\u00ed tlak, to je cesta k\u00a0rychlosti.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cyklisti\u010dt\u00ed purit\u00e1ni si musej\u00ed trhat posledn\u00ed vlasy z hlavy. Nejd\u0159\u00edv je zdeptaly kotou\u010dov\u00e9 brzdy. Pak elektronick\u00e9 \u0159azen\u00ed. A te\u010f je [&hellip;]<\/p>\n","protected":false},"author":138,"featured_media":25196,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[126,52,56,1161,1884,31,9,3531,1990],"global-categories":[411],"class_list":["post-25192","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rady-tipy","tag-cyklistika","tag-giro-di-italia","tag-horska-cyklistika","tag-plaste","tag-pneumatiky","tag-rady","tag-silnicni-cyklistika","tag-sirsi-pneumatiky","tag-tlak-v-pneumatikach","global-categories-cycling"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.3 (Yoast SEO v25.9) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u0160ir\u0161\u00ed pneumatiky a ni\u017e\u0161\u00ed tlak v nich v\u00e1s na kole zrychl\u00ed. Nev\u011b\u0159\u00edte? | \u0160koda We Love Cycling - \u010cesk\u00e1 republika<\/title>\n<meta name=\"description\" content=\"\u0160ir\u0161\u00ed pneumatiky zrychl\u00ed ka\u017ed\u00e9ho cyklistu. Je to proti logice? Tak pozorn\u011b \u010dt\u011bte...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.welovecycling.com\/cs\/2024\/04\/09\/sirsi-pneumatiky-a-nizsi-tlak-v-nich-vas-na-kole-zrychli-neverite\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0160ir\u0161\u00ed pneumatiky a ni\u017e\u0161\u00ed tlak v nich v\u00e1s na kole zrychl\u00ed. Nev\u011b\u0159\u00edte?\" \/>\n<meta property=\"og:description\" content=\"\u0160ir\u0161\u00ed pneumatiky zrychl\u00ed ka\u017ed\u00e9ho cyklistu. Je to proti logice? 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