Yes. It's simply called flipping the stem.
1986 Diamondback Apex ~ 1988 Diamondback Ascent EX ~ 1989 Jamis Dakar ~ 1989 Specialized Stumpjumper Comp
1993 Trek 8300 Composite ~ 1993 Diamondback Axis Team Titanium ~ 1995 Diamondback Apex
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At a second glance, that stem does really look like a tiny penis.