Hey Kevin, so here's a fun fact...when you are driving on the highway the pressure will increase one PSI every five minutes in the first 20 minutes of driving. So what that means is you'd see about 115 psi if the tires were inflated to 110. So I would probably set the max of your sensor setup to 120ish and the minimum to maybe like 90 or so? There isn't a set number but this would work well. view full answer...