A833 Speedo Gear Drive Question

70SwingerGuy said

I dont know how much more accurate I could be with the gear ratio, I measured the circumference and using masking tape, marked it out in one in increments with a half way point which would give me a 3.55 ratio should it stop there. Twice it gave me a slightly more than 3.55, but slightly less 3.73.

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Well slightly this and slightly that is an error of up to 5%.
And another 1/4 inch error is another .78 error in circumference.

The point I was trying real hard to make,
was how prone to error your method is.
Not the Chart, it is fine.
Whereas the Percent difference never doesn't work, and is accurate as your GPS app is at measuring a mile.