The issue is that to truly make an online calculator you need to add stat weights that depend on the changing conditions. For instance, if its horribly rainy or if it is icy, almost every online calculator will overestimate the pressure very badly. Its easier to "misuse" an online calculator than one might initially suspect. When I used to have to ride in the sleet, id take my mtb tires that I normally pump to like 60-80 and take most of the air out, probably run like 20 if that. These numbers are estimates because as has been pointed out in this thread gauges can be deceiving, a ballpark of +-15% of your target is almost always adequate and easily detectible by hand. I'm not taking out air and then rechecking the pressure with a gauge lol, nobody did that.Trying to put that in an equation is difficult.
Last edited by LarrySellerz; 03-22-23 at 01:58 PM.