I am pretty sure I saw that add in Bicycling Magazine, if it is the one I am thinking of it is a small rider with huge thighs and no shirt with a jersey tanline. Try the last couple issues, maybe the bike review issue.
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2005 Giant OCR Composite3
2005 Trek 3700
2006 Flyte SRS-3 FINISHED!!!!!!!!!!!!!!!
2008 Gary Fisher X-Caliber 29er
.........that's how I Roll.