Originally Posted by
mpetry912
But for a typical 28mm tire on a common road bike, ridden in non competitive conditions, 80-90 psi is a good starting point.
I'm sceptical that a calculator or app can better determine the right tire pressure than I can do for myself. Remember air temperature has something to do with it too.
/markp
I run around 60psi on my 28C GP5000s, which is basically what the calculators suggest for my bike's system weight (88kg rider plus 9kg bike). It's a great compromise pressure between speed and ride comfort, and most certainly doesn't feel at all sluggish to me.