Mountain Biking Ayr

Need advice, opinions on bicycling in winter time in Scotland?
I am wanting to see the countryside a bit more and save money so I am deciding to buy a mountain bike and bycycle from a town called Irvine to a town called Ayr or to Glasgow every day.
Is this being realistic?
I think it is only 17 or so miles to Ayr from Irvine and maybe twice that to Glasgow?
what is your opinions on this?
Thanks!
It will be hard going in the cold (especially if it snows and freezes over!)
Highland Mountain Bike Park’s Ayr Academy Coaches

