4 Too much air pressure
Too many riders pump their tires until they’re hard. Subsequently, they bounce more on every bump, increasing the roughness of the ride while decreasing control.
For traction and comfort you need fat, soft tires.
The fatter they are, the lower the air pressure required. Other factors that affect your perfect pressure include weight, terrain, and speed.
Don’t worry about pounds per square inch; use your thumb to check the rubber’s squish factor. Experiment until you discover what works best. You’ll know your tires are too soft if you start experiencing pinch flats. Add a bit more air and they’ll be just right.