2005 Allez Seat Tube diameter

dodgerdog Posts: 292
edited July 2011 in Road buying advice
Any one know what the seat tube diameter is? I have a 2005 Triple but am at work hence the question and am looking to get a new/replacement 105 front mech.

Any leads much appreciated as the web is proving useless
Allez Triple (hairy with mudguards) - FCN 4
Ribble Gran Fondo