Originally Posted by ShocknAwe
You can actually damage the compound permanently by running them in temps that are too low.
This is certainley the case if they are used for extended periods of times in constant low temps.
If the ambiant temp is constantly below 5-7degC for greater than 6-8 weeks or longer, then yes, the compound can be damaged.
My winter tyres are so much better in dry, sub 5degC temps than my summer tyres, that I wouldn't even consider running summers in winter, even here in the UK in a relatively mild winters.
I don't know why the OP is so obsessed with asking about wear rate of his summer tyres in low temps - seems an irrelevant question to me