Originally Posted by
FBinNY
I don't see the problem. Jargon often uses words in ways different than "standard" English. The language is fluid and words mean what speakers and listeners take them to mean.
I doubt there's anybody who doesn't know what's meant by "geometry" in the context of bicycle frames. In all fairness it's not a bad choice of words anyway, since we're talking about lines and angles.
IMO- "dimensions" in this context is a bit too limiting since many don't include angles when they think dimensions.
Actually the term geometry in the context of bicycles has really three different references often conflated:
1. Fit aka 3 pt contact of rider to the bike which includes stack and reach
2. Angles of the frame like sta, length/angle of seat stays and head tube angle and fork rake/trail etc that affect handling and ride compliancy.
3. Frame tubing cross-section...say aero versus round tube or asymmetric tubing of carbon and AL bikes versus more uniform steel and Ti which creates differential stiffness.