It is better to have new summer tyres than worn out winter tyres. And to add on that, most people call them snow tyres but they should be called winter tyres, as the rubber is harder on summer tyres and becomes hard like stone in low temperatures.
Over here we say that if the temperature goes below 10degC (averaged between lowest and highest) you should fit them, October to April more or less.
40cm here and lots of fun, apart from the idiots with 4 ton '4x4' in the middle of roundabouts... sideways... 🙄
Edited by MacGyver, 02 March 2018 - 09:19 AM.