Looking for advice from anyone that has experienced the ride of the 2007 Wilier Izoard and/or the Wilier Mortirolo. I have recently purchased the Izoard and although I am very pleased with it's speed and handling I am finding it a bit uncomfortable over the longer rides, with shoulder and neck pain coming through after 2 hours or so. It doesn't help that I have bought bought the frame one size too small, but I have configured it to gain a relatively relaxed (upright) position. I am giving thought to trying the Mortirolo which supposedly is a more comfortable frame, but unsure as to just how much difference there is between the two in terms of characteristics. Any comments would be appreciated.

There is very little difference between the two in terms of geometry. Size for size the Mortirolo has a 1/2 cm shorter toptube, and a shorter headtube. The headtube angle is 1/2 degree steeper. The chainstays are the same length on both. You would notice no huge difference between the two with your bike set up the way you described it. I suggest you get your bike professionally fitted. Neck and shoulder pain are almost always related to stem length, providing you bought the proper size frame anyway.

Thanks for the advice. I have had the bike fitted at LBS, but unfortunately there is only so much I could do because I bought 1 size down from what I should have. I have already flipped the stem to gain more handlebar height, but because the head tube is short (relative to how I am trying to configure the bike) there is not much more I can do in terms of height. Based on what you have said, I will look at trying a new (shorter) stem to see if that will assist.