[megotmea7]

you tire pressure is dependent on were your driving: for example if you driving at high speed adding more air than normal decreases rolling resistnace from the tire and decreases the heat produced form traveling at higher speeds, under inflating tires usually creates a larger contact patch and increases grip somewhat, the underinflating to have a better ride s true alson because if you think of a baloon when you blow it half way up and squeeze it is more kooshy than if you blew it all the way up same thing applys to tires, underinflated tires also decrease gas mileage and underinflated tires can help a heavy car or truck travers sft sand or mud situations by alowing it to "float" over it but that doesnt mean take your civic out to the desert put 10psi all around and think your not going to get stuck it only help, and little at that it mostly helps on bigger tires too