Originally Posted by HTupolev

Neither do Gatorskins. But there is a minimum PSI on the box. For 23 GP5000, Continental specs a minimum PSI of 110.




They usually are not, or at least not any reason based on anything that the user has any reason to care about. For example, previous-gen Vittoria tires had very high pressure minimums that were based on meeting ETRTO drop requirements when a bicycle was as heavily-loaded as Vittoria could imagine a bicycle being. Like, the logic was literally "you need to pump 100PSI into your 27mm tires because, if you use less than that and a tall morbidly obese guy sneaks up and rides off with your bicycle, the amount that the tires are deforming underneath him might be in violation of ETRTO specifications."

From a safety standpoint, what can go wrong with low pressure is if the tire doesn't manage to seat properly (which is so rim-and-setup-dependent that a single PSI number is useless), or if the tires are being run at such extreme drop that the amount of sidewall deformation is chewing up the casing (which is totally load-dependent and, for 28mm tires under a 155lb rider like the OP, would involve massively less than the 80PSI they're looking at).