- Jun 8, 2006
"stretch" - the chain mesh of quality diamond pattern snow chains does not stretch. Snow chain links wear from use where they join the next link, just like a metal watch band or a necklace does over time. This is why a snow chain gets larger or "grows" in size over time. The adjustment component, or tensioner, is provided to compensate for this on the snow chain
"Tyre circumference"- will always vary slightly between different makes and models of tyres in a given tyre size. The adjustment component, or tensioner, is provided to compensate for this on the snow chain.
"Tire-Size-Calculator"- is provided to calculate alternative tyre sizes as replacement for the original tyre fitment size.
The 'TSC' can only provide partial information in relation to snow chain size fitment.
Correct snow chain fitment relates to four dimensions.
A) Diameter or circumference of the tyre.
B) Width of the tyre tread.
C) The form of the shoulder of the tyre. The rounder the shoulder, the lower the volume of the tyre. On very square shoulder off-road 4WD tyres, because of the greater the volume of the tyre, a larger the chain may be required.
D) Wheel rim width. The wider the wheel rim width that a given tyre size is fitted to the greater the volume of the tyre and a larger the chain size may have to be used to ensure the correct fit
"fit depending on tyre wear" - again the adjustment component, or tensioner of the snow chain, is provided to compensate for tyre wear.
For example, for a 215/60R16 tyre, fitted to a Ford Falcon, the difference in diameter between a new tyre and worn out tyre is only about 3% (from approx. 688mm down to 670mm)
"a sheet of plastic you can lie on" would only ever be required to fit a ladder pattern snow chain. No sign of having to "lie down on a sheet of plastic" for fitting a Konig, Thule or a Rud diamond pattern snow chain, or even a spider chain, in their fitting videos.