It's on the derailleur tab just in front of the rear pop rivets on the tab (behind the derailleur). There definitely isn't a serial number on either rear dropout. I just looked at my bike again and took the rear wheel off. But I searched all over the frame w/a flashlight many times and found nothing not hidden by rims, etc. However, just to be totally honest about how dumb I am, I had to Google front derailleur tab and look at pics to know what you're talking about, so may be looking in wrong place. I wish I had the original one.There's a warning label there that says to read the manual before operating but I don't see any serial number. I also noticed my bike has a different fork on it. I noticed that the orange color is different between the 2 bikes. 2017 Member since: Apr 2004 Home: Springfield, VA Olympus 26' Comfort bike posted at 2:34:34 PM post #8 viewed 7634 times Thanks KrateKraig. posted by Hot huh? BostonBullDog Lifetime: 58,080 mi Member No.Ĥ688 Member since: Jan 2005 Home: Malden, MA Madone 6.2 Road bike posted at 12:15:20 PM post #7 viewed 7645 times I had a bike that the serial number was stamped on the inside of the non drive side rear dropout. 6853 Member since: Apr 2005 Home: Madison, NC Team Road bike posted at 6:51:44 PM post #6 viewed 7691 times I have another Colnago but it does not have serial numbers on it. Looks like it, was told it was a 2002 Colnago Classic 'Rabobank' theme paint. Lifetime: 23,483 mi Member No.ġ3469 Member since: Mar 2006 Home: Roscoe, IL Turbo Levo HT Comp Fat Electric bike posted at 6:47:45 PM post #5 viewed 7694 times I've been Google Imaging. I have another Colnago but it does not have serial numbers on it. I cannot find it on the website links from KrateKraig so I'll try the serial number. 2017 Member since: Apr 2004 Home: Springfield, VA Olympus 26' Comfort bike posted at 5:37:19 PM post #4 viewed 7704 times Thanks. My Tommasini is a 2 digit year and month followed by a 3 digit production number. It most often is year - month - day but can be year - week of the year (01 - 52) or some variation like that. 1798 Member since: Mar 2004 Home: Ballwin, MO Sintesi Road bike posted at 4:48:28 PM post #3 viewed 7713 times The date code is sometimes hidden in the serial number on those older Italian bikes. 13469 Member since: Mar 2006 Home: Roscoe, IL Turbo Levo HT Comp Fat Electric bike posted at 4:22:01 PM post #2 viewed 7721 times Another way to tell is by looking in the company catalog. Posts about Colnago Serial Number written by saarf. 47108 Member since: Jan 2012 Home: TX Corsa SWB Recumbent bike posted at 3:40:24 PM post #1 viewed 7729 times NICE BIKE!!! Maybe you can contact the Company and give them the serial number and they can tell you. Thread edited on at 3:13:58 PM Grateful_G Lifetime: 121,142 mi Member No.

Colnago serial number chart