A pneumatic tire for use on trucks is disclosed. The tire (10) comprises a tread (12) and a belt structure (50) located radially inward of the tread (12). The belt structure (50) includes a first working belt (54) and a second working belt (56), wherein the angle of the first and second working belts (54, 56) range from 10 degrees to 50 degrees as measured relative to the circumferential direction of the tire (10). The belt structure (50) further comprises a relatively low angle belt (58) having extensible reinforcement cords angled at less than 5 degrees relative to the circumferential direction of the tire (10). The tread (12) comprises at least one groove (34, 35, 36) reinforced with a tread compound having (i) a tensile strength at break greater than 18 MPa and an elongation at break greater than 450%, when measured at 23°C, and/or (ii) a tensile strength at break greater than 12 MPa and an elongation at break greater than 600%, when measured at 100°C.