Originally Posted by
carleton
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?
So, from reading a bunch if websites, it seems that those who calculate "gear meters" use the constant of 2.1 in their calculations.
50t/15t = 2.1*50/15 = 7.0 gear-meters is the same as
50t/15t = 27*50/15 = 90.0 gear-inches
I know it's not perfect, but it's a relative measure that we use when communication amongst each other.
Can anyone confirm that the "rule of thumb" constant for calculating gear-meters is 2.1? If no one corrects me, 2.1 is goin' in the app
