Heavy duty pneumatic radial tire

Details Heavy duty pneumatic radial tire Heavy duty pneumatic radial tire

B - Operations, Transporting

60

C

152/95.2

B60C 15/06 (2006.01) B60C 15/00 (2006.01)

Patent

CA 1260373

ABSTRACT OF THE DISCLOSURE Heavy duty pneumatic radial tire which has the feature as follows : a pair of bead cores ; a carcass ply which is composed of steel cords being turned up around the bead core from the inside toward the outside and disposed with respect to the radial direction ; a belt layer whose cords are disposed at a comparative low angle with respect to the equatorial line of the tire and a steel cord reinforcing layer disposed adjacent to the outside of the turned upportion of the carcass ply, the height ho of the said turned up portion from the bead base portion is within a range of between 55 mm and 80 mm. The rubber thickness t which is between the carcass ply itself and its turned up portion, is at a certain height h from the bead base portion, t /h decreases gradually in inverse proportion to values of h/ho within the range of 0.3? h/ho?0.5 or 0.3? h/ho?0.8, and takes an approximate constant value from 0.1 to 0.25 within the range of 1.0? h/ho>0.5 or 1.0? h/ho>0.8.

507870

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