Serial number location
My wife's Giro 20's bottom bracket shell is clean, as is the inside of the rear dropouts. We bought the bike used in 2010 in new condition (the woman rode it 50 miles - maybe!). Other ideas on serial # location. I'm familiar, I thought, with all the hiding places, but having had the bike on stand upside down and vertical hasn't helped me.
Anyone out there riding an older model Giro 20 in the medium frame? If so, I'd like to know the x-seam parameters. The one we have is a small, otherwise my 5'5", 39" x-seamed wife wouldn't fit it I'm thinking.