Since misunderstood question here, a new question with narrow scope. So what are equipments need for frame-building?
Simply knowing the number of teeth on a chainring can we determine an accurate diameter?
What would be the “definitive” formula to calculate chainstay length from sprocket size, chainring size and number of chain links?
Before I started to write this answer, I thoroughly read this question, its answers and comments: How do I calculate the diameter of a chainring from the number of teeth? So, my question tries to ...