UPDATE:
I'm working on having options for:
- Nominal Imperial (gear inches of development, i.e. 50t/15t = 90"
- Ratio (50t/15t = 3.3)
- Metric (gear meters of developemnt)
In the US, rider in the infield will use the following to calculate "gear inches"
50t/15t = 27*50/15 = 90.0
What value (instead of "27" above) do the Euro riders use to calculate gear meters?