Kdy\u017e za\u010dnete prozkoumat, kdy stoj\u00ed za to p\u0159ezout letn\u00ed pneumatiky na zimn\u00ed, obvykle je doporu\u010deno vym\u011bnit je jakmile teplota klesne pod 7\u00b0C . Pro\u010d pr\u00e1v\u011b 7 a ne 0 stup\u0148\u016f? Plnou jistotu je t\u011b\u017ek\u00e9 naj\u00edt, ale podle m\u011b\u0159en\u00ed a racion\u00e1lnost\u00ed lze vysv\u011btlit toto mytick\u00e9 \u010d\u00edslo.<\/p>\n
Odborn\u00edci \u0159\u00edkaj\u00ed, \u017ee kdy\u017e pr\u016fm\u011brn\u00e1 denn\u00ed teplota klesne na 7 \u00b0 C, doporu\u010duje se vym\u011bnit pneumatiky, proto\u017ee zimn\u00ed verze zaji\u0161t\u00ed vy\u0161\u0161\u00ed bezpe\u010dnost. Toto doporu\u010den\u00ed bylo jednomysln\u011b p\u0159ijato odborn\u00edky, a v\u00fdrobci pneumatik se zhodli tak\u00e9. D\u016fvod je jednoduch\u00fd: p\u0159i pr\u016fm\u011brn\u00e9 denn\u00ed teplot\u011b o 7 \u00b0 C je u\u017e po\u010das\u00ed chladn\u00e9, a teplota klesne \u010dasto i pod bod mrazu a cesty mohou b\u00fdt ledov\u00e9.<\/p>\n
Tato teplota byla stanovena z bezpe\u010dnostn\u00edho hlediska, proto\u017ee pod touto teplotou pou\u017eit\u00ed zimn\u00ed pneumatiky zaji\u0161\u0165uje mnohem lep\u0161\u00ed p\u0159ilnavost, krat\u0161\u00ed brzdnou dr\u00e1hu a snadn\u011bj\u0161\u00ed ovl\u00e1d\u00e1n\u00ed auta. Pneumatiky \u2013a v prvn\u00ed \u0159ad\u011b jejich slo\u017eky p\u0159\u00edrodn\u00edho kau\u010duku – se vytvrzuj\u00ed p\u0159i n\u00edzk\u00fdch teplot\u00e1ch, vym\u011bknou, kdy\u017e je situace nebezpe\u010dn\u00e1. Rozd\u00edl mezi letn\u00edmi a zimn\u00edmi pneumatikami je ve vzorku dez\u00e9nu a tak\u00e9 v kau\u010dukov\u00e9 sm\u011bsi, kter\u00e1 je optimalizov\u00e1na pro sez\u00f3nu, co\u017e znamen\u00e1, \u017ee zimn\u00ed pneumatika zachov\u00e1 svou m\u011bkkost i v chladn\u00e9m po\u010das\u00ed, co je d\u016fle\u017eitou podm\u00ednkou pro p\u0159ilnavost.<\/p>\n
Pokud by vozovky byly i v zim\u011b such\u00e9, pou\u017e\u00edv\u00e1n\u00ed letn\u00edch pneumatik by bylo bezpe\u010dn\u00e9 i pod 0\u1d52C, proto\u017ee kv\u016fli men\u0161\u00ed dr\u00e1\u017ece v dez\u00e9nu je pneu v kontaktu se silnic\u00ed s v\u011bt\u0161\u00edm povrchem. Na mokr\u00e9m a kluzk\u00e9m asfaltu maj\u00ed vzorky dez\u00e9nu, drobn\u00fdch hran a \u017eeber velk\u00fd v\u00fdznam, d\u00edky nim\u017e je zimn\u00ed pneu p\u0159ilnav\u011bj\u0161\u00ed na silnici.<\/p>\n
Obecn\u011b \u0159e\u010deno, \u010d\u00edm m\u011bk\u010d\u00ed je sm\u011bs, z n\u00ed\u017e b\u011bhoun zimn\u00ed pneumatiky je vyroben, t\u00edm v\u011bt\u0161\u00ed bude p\u0159ilnavost za tepl\u00e9ho po\u010das\u00ed? S p\u0159\u00edchodem jara by se zimn\u00ed pneumatiky m\u011bly vym\u011bnit, proto\u017ee maj\u00ed tendenci zmek\u010dit se, intenzivn\u011bji se opot\u0159ebov\u00e1v\u00e1 a pry\u017eov\u00e1 sm\u011bs pou\u017eit\u00e1 pro zimn\u00ed pneu je m\u011bk\u010d\u00ed a p\u0159ilnav\u011bj\u0161\u00ed ne\u017e ta v letn\u00edch a ve vy\u0161\u0161\u00edch teplot\u00e1ch m\u011bn\u00ed sv\u00e9 vlastnosti. Tak\u017ee t\u011bch 7 \u00b0 C by mohlo b\u00fdt dobr\u00e9 sm\u011brov\u00e9 \u010d\u00edslo v obou sm\u011brech.<\/p>\n
Nen\u00ed to jen \u0161ikovn\u00fd trik v\u00fdrobc\u016f pneumatik? Dalo by se p\u0159edpokl\u00e1dat, \u017ee letn\u00ed a zimn\u00ed pneumatiky vyr\u00e1baj\u00ed pouze kv\u016fli v\u011bt\u0161\u00edho pr\u00edjmu, ale kdy\u017e se nad t\u00edm zamysl\u00edte sou\u010dasn\u011b, pou\u017e\u00edv\u00e1me jen jednu sadu pneumatik, tak\u017ee pneumatiky nekoup\u00edme \u010dast\u011bji, proto\u017ee n\u00e1m vydr\u017e\u00ed dluh\u0161\u00ed \u010das. Nav\u00edc pro v\u00fdrobce znamen\u00e1 vyv\u00edjen\u00ed, vyr\u00e1b\u011bn\u00ed, testov\u00e1n\u00ed a skladov\u00e1n\u00ed r\u016fzn\u00fdch pneumatik dodate\u010dn\u00e9 n\u00e1klady.<\/p>\n
Tak\u017ee nov\u00e9 typy pneumatik a jejich sez\u00f3nn\u00ed varianty se objevuj\u00ed na trhu opravdu pro n\u00e1s, \u0159idi\u010de. Na\u0161t\u011bst\u00ed se jedn\u00e1 o sout\u011b\u017e, jej\u00ed\u017e dobr\u00e9 v\u00fdsledky jsou k na\u0161emu prosp\u011bchu.<\/p>\n","protected":false},"excerpt":{"rendered":"
Kdy\u017e za\u010dnete prozkoumat, kdy stoj\u00ed za to p\u0159ezout letn\u00ed pneumatiky na zimn\u00ed, obvykle je doporu\u010deno vym\u011bnit je jakmile teplota klesne<\/p>\n","protected":false},"author":1,"featured_media":128,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[84],"tags":[],"class_list":["post-141","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zimni-pneumatiky"],"_links":{"self":[{"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/posts\/141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/comments?post=141"}],"version-history":[{"count":1,"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/posts\/141\/revisions"}],"predecessor-version":[{"id":142,"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/posts\/141\/revisions\/142"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/media\/128"}],"wp:attachment":[{"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/media?parent=141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/categories?post=141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/1pneu.eu\/pneublog\/wp-json\/wp\/v2\/tags?post=141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}