I currently have a 2009 Trek 1.2 and a 2012 Trek Madone 4.5. Due to constraints at home I am having to look into getting rid of one of these. I am looking at keeping the Madone and putting my commuting wheels onto it for week days and using the carbon wheels for sportives etc. Does any one have any experience / pearls of wisdom / thoughts on using a full carbon bike for commuting? Rack is not an issue as I use a rucksack and commute about 13 miles each way about 3 times a week.