More information needed.
What part of the tube fails? Where are the holes, rim side or tread side?
Underinflation often causes "snake bite holes", a pair of slits caused by the tube being pinched between the tire tread and rim, but not always in pairs. You probably do need more than 100 psi, depending on the total load on the tires. More pressure is needed in the rear tire because it carries well over half the load.
Holes on the rim side of the tube are often due to inadequate rim tape, or rough handling of the valve stem.
Blowouts are often due to a small portion of the tube being pinched between the tire bead and rim, any part of the rim.
In the southwestern U.S. many flats are caused by goathead or grass burrs. These cause tiny round holes on the tread side of the tube and are more common in the late summer and early fall.
Last edited by Al1943; 08-15-10 at 04:24 PM.