Effects on Chain Geometry: Calculate Total chain length based on number of links and pitch
Based on the number of links and the entered Chain pitch, the theoretical chain length can be calculated and is shown in table "Chain geometry changes due to sprocket & chain changes". This information is not of much use except that it is used to calculate the necessary sprocket distance later on.
Remark: This shown length does not change (except when manually changing pitch or number of links) when changing sprockets ! It is assumed that you keep your current chain. The length of your current chain is used to calculate the new needed sprocket distance (that DOES change when changing sprockets). See next Help page.
Since you do not buy a chain that has 1492 mm of length (or 58,5") but buy a chain that has X-links with pitch Y, the needed chain length is calculated differently later on in the Help files. Just keep reading the next Help pages. But fist we will check if we can keep the current chain and move the rear wheel forward or backwards.
Next:
Calculate sprocket distance based
on total chain length and sprocket combination