ratio is the ratio between the front- and the rear-sprocket and is
called final as it is last in line in the total gearing setup of
engine to gearbox, gearbox to front sprocket and front- to
need 47/16 (2.938) but don't have that and do not want to buy more
But beware that not all combinations are suited for fitting on the bike. Make sure there is enough clearance for the sprockets, enough chain length available and enough clearance for the chain not to touch the swing arm in the front. What changing to another sprocket combination does to your chain geometry can be seen in table: "Chain geometry changes due to sprocket & chain changes".
By hovering the cursor over the crossing of grid lines and colored Rear teeth lines, the ratio, front teeth and rear teeth are shown.
If you want to display the graph for other ratios, change the Custom setup final ratio on the main page. This chart is not related to any other bike specific settings, just the Front- and Rear sprockets in Custom setup (which are shown in the graphs sub-title) ! So this final ratio graph is valid for any bike, hence the title 'Generic'.
You can print the graph clicking the 'Print Graph'-botton. When printing to an installed 'print to pdf'-printer, you can save the graph as PDF-file.
Next: RPM Differences Graph