Drive belt with a carrier ring and transverse segments

A transverse segment (33) for a drive belt (3) with a carrier ring (31) and with a number of such transverse segments (33) that are slideably mounted on the carrier ring (31), which transverse segment (33) is provided with two friction surfaces (43), between which friction surfaces (43) the transverse segment extends in width direction, and with two main body surfaces (38, 41), between which main body surfaces (38, 41) the transverse segment (33) extends in thickness direction, whereof at least one main body surface (38) is provided with a transition surface (42) that extend in width direction and that forms a transition between an outermost part of the transverse segment (33) with a predominantly constant thickness and an innermost part of the transverse segment (33) whereof the thickness reduces in height direction away from the transition surface (42), which transverse segment (33) is further provided with at least one opening (44) that is located in the said innermost part and that cuts in thickness direction through the transverse segment (33), characterized in that at least one of an upper boundary surface (46) of the opening (44) located on the top side thereof and a lower boundary surface (45) thereof located on the bottom side thereof is provided with protrusions (47), i.e. is undulating.