Originally posted by kbret
i imagine that it would be simple. A friend of mine and I traveled to Milan last year from the states. we were traveling a bit without bikes first - went to the storage part of the airport. Stored our big hard cases for 5 days - came back and picked them up - NO PROBLEM! It's not very expensive and beats the hell out of lugging around those cases if you're not biking. It saved us tons - on headaches, but especially on renting a bigger car. You could always put your bike together in the airport and store the case.
I've found in europe that in every train station, airport, and bus station there is a place for 'left luggage' that is safe, pretty cheap and well worth leaving the big stuff behind.
biking in northern italy was amazing. the drivers are really courteous and give you a wide berth. we were on a tour for the giro with graham baxter sporting tours. it was pretty inexpensive ... we figured we would have paid double to do the same trip on our own. with rental cars, meals, etc. so good - we're going again in may!