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  1. Ja hyvälaatuiset (kalliimmat?) ketjut kestävät kuumavahattuna vieläkin pidempään.
    Ketjujen huonous/hyvyys ei poista tarvetta niiden säännöllisestä huoltamisesta.
  2. Tuo Zero Friction Cyclist sivusto joka on varmastikkin se "luotetuin" sivusto polkupyöräketjujen ja isoimmin etenkin ketjuissa käytettävien öljyjen/vahojen testauksessa maailmanlaajuisesti ja jonka testituloksia käytetään yleisesti sinä "raamattuna" pyöräpiireissä ja joita tuskin tälää palstalla on ketään jotka voivat heidän testituloksiaan oikeastaa millään faktatiedolla kumota, koska kyseisellä taholla on vuosien käytönnön testikokemukset takana ketjujen mittaamisesta.

    Sivustolta poimittua: (ja voi ajaa googlen kääntäjään jos Englanti ei taivu itsellä tarpeeksi).

    Q1 – What is the difference between budget chains and premium chains?
    A1 – Budget chains you can expect will be made of lower grade steel, and will likely have no surface hardening or low friction treatments or coatings applied (or limited parts receive treatment – i.e inner plates are treated but not pins or rollers.) Premium chains you can expect will be made of higher grade of steel, manufactured to tighter tolerances, and may have numerous treatments such as chromium carbide hardened pins and/or rollers, nickel plating or titanium nitride plating on inner/ outer plates, and again a variety of low friction coatings applied to some or all working parts of the chain.

    Q2 – Is it worth spending the extra on a premium chain or just buy cheap chains and replace more frequently? (especially for non racers)
    A2 – For racers definitely premium chains. For weekend warriors / commuters – buying cheap chains can often be a false economy. Cheap chains can have such a fast wear rate that they will often rip past 0.5% wear in a blink and result in needing to buy new cassette, even new chain rings – when replace chain. Many cyclists are not on top of chain wear tracking. However – if you are and replace chains prior to them causing damage to cassette, this testing will assist in what is the most economical choice.

    Q3 – Does a chain that demonstrates exceptional longevity = a lower friction chain?
    A3 – Maybe, but this requires further investigation. A premium chain may be very fast for a little while, but once low friction coating is worn off it may offer no real friction benefit vs other more budget options. However if a premium chain has surface hardening / plating’s and is made of a higher quality steel – I believe it is more likely to be lower friction. As lubricants become abrasive from contamination – think of it like running a piece of sandpaper on a block of wood vs a steel plate – it is likely it would take more effort to slide the sandpaper across the wood as it will be abrading away material. So very hard surfaces are likely to have a sliding surface friction advantage vs softer metal surfaces, however I will be investigating this further in time.