Geometry calculation depends on stack and reach

[jdtoy]

While most modern bikes will be specified with a stack and reach values, there are many examples in the geometrygeeks database of older and more niche bikes that do not have these parameters.

The current calculation will fail for these bikes.

visual-comparison/src/parse-geometry.js

Line 47 in 149aef3

// TODO: Develop method for bikes where stack and reach are unknown.