Are porosity leaks a greater problem in retreads?
Yes. Retreads generally lose more air through porosity. Many re-tread manufacturers attempt to rectify this by coating the inner liner with rubber/sealing coatings or paint, with varying degrees of success. Q. What effect does cold weather have on tire pressures? Tire pressure is affected by temperature changes – both ambient and tire build up. The air volume actually compacts and expands one pound for each 10 degree change in temperature. Q. Do tires bleed more in cold air? The tires do not bleed off air rather porosity can increase in severe cold depending on tire quality. Cold temperatures can also cause a difference in the rate of contraction between the tire rim and the bead. TR/FS will prevent this and porosity leaks. Q. Does operating temp vary due to size of tire? Operating temp is dependent solely on (1) Pressure (2) Load (3) Speed. Tires are designed to operate at an optimum temp range of 180 F- 200 F. Q. Do correctly inflated tires run hotter under heavy load conditions? Ope
