Radial tyre for a vehicle of the agricultural and NF ("Normal Flexion") type, which, within the meaning of the 2020 ETRTO ("European Tyre and Rim Technical Organization") standard, has a speed index at least equal to D for a maximum speed equal to 65 km/h, which tyre is intended to be mounted on a rim with a diameter at least equal to 28 inches, and has a load index at least equal to 140 and at most equal to 170, comprising: - a tread intended to come into contact with the ground, which tread has an axial width LT and comprises a central portion with an axial width LT/2 and two axially outer portions, each with an axial width LT/4, - the two axially outer portions comprising tread pattern blocks with a radial height at least equal to 45 mm, these blocks covering at least 80% of the axial width LT/4 of the axially outer portions of the tread and having a circumferential thickness ep at least equal to 42 mm, - a crown reinforcement radially on the inside of the tread, comprising 3 working layers (31, 32, 33): a radially innermost working layer, a radially outermost working layer and an intermediate working layer, each working layer comprising mutually parallel textile reinforcing elements made of PET (polyethylene terephthalate), which are coated in a rubber material and form angles at least equal to 12° and at most equal to 45° with the circumferential direction of the tyre, - the reinforcing elements of the working layers having an ultimate tensile strength at least equal to 32 daN, measured according to the standard denoted D885/D885M - 10A, characterized in that the angles (ANT1, ANT3) respectively formed by the reinforcing elements of the radially innermost working layer and the radially outermost working layer with the circumferential direction are at most equal to 20° and have the same orientation, in that the angle ANT2 formed by the reinforcing elements of the intermediate working layer with the circumferential direction has an opposite sign to the angles ANTI and ANT3, and in that the absolute value of the angle ANT2 is greater than 10° plus the absolute value of the average of the angles ANT1 and ANT3. - a tread intended to come into contact with the ground, which tread has an axial width LT and comprises a central portion with an axial width LT/2 and two axially outer portions, each with an axial width LT/4, - the two axially outer portions comprising tread pattern blocks with a radial height at least equal to 45 mm, these blocks covering at least 80% of the axial width LT/4 of the axially outer portions of the tread and having a circumferential thickness ep at least equal to 42 mm, - a crown reinforcement radially on the inside of the tread, comprising 3 working layers (31, 32, 33): a radially innermost working layer, a radially outermost working layer and an intermediate working layer, each working layer comprising mutually parallel textile reinforcing elements made of PET (polyethylene terephthalate), which are coated in a rubber material and form angles at least equal to 12° and at most equal to 45° with the circumferential direction of the tyre, - the reinforcing elements of the working layers having an ultimate tensile strength at least equal to 32 daN, measured according to the standard denoted D885/D885M - 10A, characterized in that the angles (ANT1, ANT3) respectively formed by the reinforcing elements of the radially innermost working layer and the radially outermost working layer with the circumferential direction are at most equal to 20° and have the same orientation, in that the angle ANT2 formed by the reinforcing elements of the intermediate working layer with the circumferential direction has an opposite sign to the angles ANTI and ANT3, and in that the absolute value of the angle ANT2 is greater than 10° plus the absolute value of the average of the angles ANT1 and ANT3.