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@Lynchman
^^Have you considered including drivetrain mechanics i.e. a high/high vs. low/low chainring/cog ratio?
For instance a 40/13 gear ratio is virtually identical to a 52/17 ratio, but provides an entirely different riding experience; thus low/low enabling much quicker acceleration/deceleration, while 52/17 will give you greater momentum at top speed.
*The difference might seem insignificant to your average commuter, but then again so does a gear inch calculator. However, to the experienced and/or competitive rider drivetrain mechanics i.e chain ring/cog ratio/chain link engagement really does matter.