Polkupyörän ketjut

Polkupyörän ketju on yksi pyörän tärkeimmistä voimansiirtokomponenteista. Valikoimastamme löydät pyöräketjut niin maastopyöriin, maantiepyöriin kuin kaupunkipyöriinkin – eri vaihdemäärille ja käyttötarkoituksille sopivina. Tilaa polkupyörän ketju Verkkokauppa.comista edulliseen hintaan ja nopealla toimituksella!

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Teksti:"Reilusti asiakkaan puolella". Yläpuolella kolme sakarainen kruunu-logo.
Teksti:"Todennäköisesti aina halvempi". Yläpuolella prosentti-logo.
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Polkupyörän ketju voimansiirrossa

Polkupyörän ketju on keskeinen osa pyörän voimansiirtoa, joka välittää poljinvoiman takapyörään. Ketjun kunto vaikuttaa suoraan vaihteiston toimivuuteen, poljintehokkuuteen ja muiden voimansiirtokomponenttien, kuten kasettien ja ketjupyörien, kulumiseen. Säännöllinen ketjun huolto ja oikea-aikainen vaihto pidentävät koko voimansiirron käyttöikää.

Oikean pyöräketjun valinta

Polkupyörän ketjun valinnassa tärkein tekijä on yhteensopivuus pyörän vaihteiston kanssa. Ketjut valmistetaan eri vaihdemäärille: yleisimmät vaihtoehdot ovat 6–8-, 9-, 10-, 11- ja 12-vaihteisille järjestelmille. Mitä enemmän vaihteita, sitä kapeampi ketju tarvitaan. Yksivauhtisille pyörille, kuten kaupunkipyörille ja fixie-pyörille, sopivat omat leveämmät ketjunsa.

Ketjujen materiaalit ja pinnoitteet vaihtelevat mallista riippuen. Ruostumattomasta teräksestä tai nikkelipinnoitteella käsitellyt ketjut kestävät kosteutta tavallisia teräsketjuja paremmin, mikä tekee niistä käytännöllisen valinnan ympärivuotiseen pyöräilyyn. Kevyemmät titaani- tai onttoniittipinnoitteiset ketjut puolestaan sopivat suorituskeskeisempään ajoon.

Ketjun vaihto ja huolto

Polkupyörän ketju kannattaa vaihtaa ennen kuin se on kulunut liikaa, sillä venynyt ketju kuluttaa nopeasti myös kasettia ja ketjupyöriä. Ketjun kulumaa voi mitata ketjumittarilla, ja yleinen suositus on vaihtaa ketju viimeistään 0,75–1 prosentin venymän kohdalla. Säännöllinen voitelu pitää ketjun toimintakunnossa ja vähentää kulumista. Voiteluaineen valinnassa kannattaa huomioida ajoolosuhteet: kuiviin oloihin sopii kuivavoitelu ja kosteisiin oloihin märkävoitelu.

Pyöräketjut Verkkokauppa.comista

Verkkokauppa.comin valikoimasta löydät polkupyörän ketjut tunnetuilta pyöräilybrändeiltä eri käyttötarkoituksiin ja vaihdemäärille. Tilaa pyöräketju edulliseen hintaan ja nopealla toimituksella – ja pidä pyöräily sujuvana!

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