Tyre for a vehicle, comprising: • a tread, • a crown reinforcement radially on the inside of the tread and comprising a working reinforcement, • the working reinforcement comprising at least two working layers (41, 42), each working layer (41, 42) having a linear breaking strength Rct, each working layer (41, 42) comprising metal reinforcing elements (411, 421), • the metal reinforcing elements (411, 421) of the working layers (41, 42) comprising individual metal threads or monofilaments, • a single carcass layer that is radially on the inside of the crown reinforcement and connects together two beads that are intended to come into contact with a rim and comprise textile reinforcing elements, the carcass layer having a linear breaking strength Rcc, • the linear breaking strength of a layer Rc is defined by Rc=Fr ∗ d, where Fr is the tensile breaking force of the reinforcing elements of the layer in question, and d is the density of the reinforcing elements of the layer in question, measured around the radially outermost point of the layer in question and corresponding to the mean number of reinforcing elements over a 10 cm width of the layer in question, this width being measured perpendicularly to the direction of the reinforcing elements of the layer in question, characterized in that the linear breaking strength Rct of each working layer (41, 42) is at least equal to 300 daN/cm and at most equal to 400 daN/cm, in that the elongation at break Acc of the textile reinforcing elements of the carcass layer is at least equal to 15%, and in that, if the tyre has a nominal width at least equal to 135 mm and at most equal to 235 mm, the linear breaking strength Rcc of the carcass layer is at least equal to 0.55 times the linear breaking strength Rct of each working layer (41, 42), and if the tyre has a nominal width at least equal to 245 mm, the linear breaking strength Rcc of the carcass layer is at least equal to 0.65 times the linear breaking strength Rct of each working layer (41, 42), the breaking strength and elongation at break measurements being carried out according to the standard ISO 6892 of 1984 for steel reinforcing elements. • a tread, • a crown reinforcement radially on the inside of the tread and comprising a working reinforcement, • the working reinforcement comprising at least two working layers (41, 42), each working layer (41, 42) having a linear breaking strength Rct, each working layer (41, 42) comprising metal reinforcing elements (411, 421), • the metal reinforcing elements (411, 421) of the working layers (41, 42) comprising individual metal threads or monofilaments, • a single carcass layer that is radially on the inside of the crown reinforcement and connects together two beads that are intended to come into contact with a rim and comprise textile reinforcing elements, the carcass layer having a linear breaking strength Rcc, • the linear breaking strength of a layer Rc is defined by Rc=Fr ∗ d, where Fr is the tensile breaking force of the reinforcing elements of the layer in question, and d is the density of the reinforcing elements of the layer in question, measured around the radially outermost point of the layer in question and corresponding to the mean number of reinforcing elements over a 10 cm width of the layer in question, this width being measured perpendicularly to the direction of the reinforcing elements of the layer in question,