Extra Air

The “Low Tire Pressure” light had been flashing in Pete’s car for a few days. He texted a picture of it to Dad. This is the modern method of asking for help. Dad told him to add air to his tires, and texted some key instructions. Pete followed some of the instructions, but not the one about how much pressure to put in. He didn’t find it surprising that he had to increase the pressure in each tire from 26 all the way to 40 PSI (the maximum pressure marked on the tire). More than a 50% increase! It turns out that the proper PSI level was 30. So Pete currently has 33% extra air. On the plus side, it should give him extra visibility sitting up so high above the road!