Originally Posted by
ScottCommutes
My thoughts:
4. The online calculators should better indicate which inputs are the most and least critical
Their purpose is to provide a suggested optimum pressure for a specific rider, tyre, rim, road combination. If you are thinking of changing one of those input parameters (eg wider rims or different tyres) then it is easy to see what effect it will have on the recommended pressure.
Some calculators, like Silca also provide slightly different recommendations for recreational comfort vs performance/racing etc