Originally Posted by
wroomwroomoops
Also, to obtain the same change in gearing ratio, you would need to have more difference in chainring teeth than sprocket teeth.
On the flip side, you may find that your current ratio is too high and adding one tooth on the cog gives a ratio that is too low. Because 1 cog tooth equals about 3-5 chainring teeth, you have finer control of the gearing if you swap the chainring. Also chainrings are easier to swap than cogs, unless your cog is not on tight enough to begin with.