A tire tread (110, 210, 310, 410, 510, 610, 710) having circumferential grooves (105, 305, 405, 505, 605, 705), the tread (110, 210, 310, 410, 510, 610, 710) further comprising a tread cap (102, 302, 402, 502, 602, 702) comprising a first rubber compound for contacting a road when driving, at least one circumferential groove reinforcement (103, 203, 303, 403, 503, 603, 703) forming at least one of the grooves (105, 305, 405, 505, 605, 705) in the tread cap (102, 302, 402, 502, 602, 702), the groove reinforcement (103, 203, 303, 403, 503, 603, 703) comprising a second rubber compound for reinforcing an area adjacent the grooves formed by the groove reinforcement (103, 203, 303, 403, 503, 603, 703), wherein the groove reinforcement (103, 203, 303, 403, 503, 603, 703) comprises for at least one of the grooves (105, 305, 405, 505, 605, 705) formed by the groove reinforcement (103, 203, 303, 403, 503, 603, 703): two groove sidewall layers (120, 220), each sidewall layer (120, 220) extending from the radially outer surface of the unworn tread (110, 210, 310, 410, 510, 610, 710) down into the direction of the bottom (125, 225) of the groove (105, 305, 405, 505, 605, 705) formed by the groove reinforcement (103, 203, 303, 403, 503, 603, 703) and wherein each sidewall layer (120, 220) has an essentially uniform thickness (d p) along its length, and a groove support portion (130, 230) forming a bottom portion of the groove (105, 305, 405, 505, 605, 705) and having a radially inner base side (134, 234) as well as a radially outer top side (132, 232), wherein the groove support portion (130, 230) tapers from its base side (134, 234) to its top side (132, 232), and wherein the tread (110, 210, 310, 410, 510, 610, 710) further comprises a tread base layer (104, 304, 404, 504, 604, 704) arranged radially inwards of the tread cap (102, 302, 402, 502, 602, 702), the tread base layer (104, 304, 404, 504, 604, 704) comprising a third rubber compound, wherein the groove reinforcement (103, 203, 303, 403, 503, 603, 703) extends in a radially inner direction at least onto the radially outer surface of the base layer (104, 304, 404, 504, 604, 704), characterized in that the base side (134, 234) of the groove support portion (130, 230) is from 1.1 to 5 times longer than the axial width of the bottom (125, 225) of the reinforced groove. two groove sidewall layers (120, 220), each sidewall layer (120, 220) extending from the radially outer surface of the unworn tread (110, 210, 310, 410, 510, 610, 710) down into the direction of the bottom (125, 225) of the groove (105, 305, 405, 505, 605, 705) formed by the groove reinforcement (103, 203, 303, 403, 503, 603, 703) and wherein each sidewall layer (120, 220) has an essentially uniform thickness (d p) along its length, and a groove support portion (130, 230) forming a bottom portion of the groove (105, 305, 405, 505, 605, 705) and having a radially inner base side (134, 234) as well as a radially outer top side (132, 232), wherein the groove support portion (130, 230) tapers from its base side (134, 234) to its top side (132, 232), and wherein the tread (110, 210, 310, 410, 510, 610, 710) further comprises a tread base layer (104, 304, 404, 504, 604, 704) arranged radially inwards of the tread cap (102, 302, 402, 502, 602, 702), the tread base layer (104, 304, 404, 504, 604, 704) comprising a third rubber compound, wherein the groove reinforcement (103, 203, 303, 403, 503, 603, 703) extends in a radially inner direction at least onto the radially outer surface of the base layer (104, 304, 404, 504, 604, 704), characterized in that the base side (134, 234) of the groove support portion (130, 230) is from 1.1 to 5 times longer than the axial width of the bottom (125, 225) of the reinforced groove.