A pneumatic vehicle tire with run-flat properties, having a tread (1), having a multi-ply belt assembly (2), having an inner ply (4) which is of air-tight form, having a carcass (3) which, in the bead region (5), is led from axially inside axially outward as a carcass turn-up (3a) around tension-resistant cores (6), and having side walls (8) within which there is arranged at least one reinforcement profile (9) which is of sickle-shaped cross section and which is of closed ring-shaped form around the circumference of the side wall, wherein the inner ply (4) does not run continuously through the tire cross section from bead region (5) to bead region (5), it rather being the case that, within the cross-sectional height (10) of the reinforcement profile (9), the inner ply is omitted; the inner ply (4a) is, in a region situated opposite the tread (1), arranged between the two upper ends (11) of the reinforcement profiles (9), and the inner ply (4a) does not cover said two ends (11) of the reinforcement profiles (9) axially at the inside.

The present invention relates to self-supporting tyres for vehicle wheels having sidewall reinforcement inserts (113) with reduced rigidity. These tyres have a good mileage in flat running conditions, greater comfort and significantly reduced rolling resistance compared to known self-supporting tyres, with higher modulus sidewall reinforcement inserts.

Provided is a pneumatic tire. A band-like sound absorptive member is fixed to the inner surface of a tread portion along the tire circumferential direction. An end portion in the tire width direction of the sound absorptive member is located on the outer side in the tire width direction with respect to a shoulder main groove located on the outermost side in the tire width direction. A width W1 of the sound absorptive member in the tire width direction and a tread development width TDW of the tread portion satisfy a relationship of 0.65≤(W1/TDW)≤0.90. The width W1 of the sound absorptive member and a belt width W2 of a first belt ply having the maximum width of a belt layer satisfy a relationship of 0.70≤(W1/W2)≤0.95.

The present invention relates to a self-supporting tire for vehicle wheels comprising a carcass structure comprising at least one carcass ply having a plurality of hybrid reinforcing cords (10) each comprising at least two strands (20) twisted to each other with a predetermined stranding pitch (P), wherein each of said at least two strands (20) comprises at least one monofilament textile thread (21) at least partially embedded in the filaments (22a) of at least one multifilament textile yarn (22) and a pair of sidewall reinforcement inserts (113), where at least one of said sidewall reinforcement inserts comprises a vulcanised elastomeric compound which has a dynamic shear modulus value G equal to or less than 1.25 MPa measured at 70° C., 10 Hz, 9% deformation according to the RPA method reported in the present description.

In a pneumatic tire including an annular tread portion extending in a tire circumferential direction, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed on an inner side of the sidewall portions in a tire radial direction, a load support body is disposed extending along the tire circumferential direction on an inner side of each of the sidewall portions, and the load support body is removably mounted to an inner surface of the sidewall portion via a mechanical engagement device.

A run-flat tire includes a belt reinforcing layer outward of a belt layer in a tire radial direction and reinforcing rubber in sidewall portions. Where a center region is a region of a tread portion in which a center land portion corresponding to a land portion included in land portions in a tread portion and located closest to a tire equatorial plane is positioned, the belt reinforcing layer includes a center reinforcing portion in which more pieces of the belt reinforcing layer are layered at a position of the center region than at positions other than the position of the center region, and in the belt reinforcing layer, a width Wc of the center reinforcing portion in a tire lateral direction with respect to a thickness Gr of the side reinforcing rubber at a tire maximum width position is within a range of 0.5 Gr≤Wc≤2.0 Gr.

At a run-flat tire, given that an average radius of curvature of a case line between an intersection point (0.1SHp) and an intersection point (0.2SHp) when viewed in a cross-section along a tire rotation axis is radius R1, and that an average radius of curvature of the case line between an intersection point (0.4SHp) and an intersection point (0.6SHp) when viewed in the cross-section along the tire rotation axis is radius R2, ratio R2/R1 is set to be greater than 0.3.

A rubber composition is based on an elastomeric matrix comprising from 40 to 80 phr of at least one butadiene elastomer, a vulcanization system comprising sulfur and a vulcanization accelerator, in which the weight ratio of sulfur to vulcanization accelerator is strictly less than 1, and at least 55 phr of organic filler mainly comprising a carbon black, called black G, having a BET specific surface area ranging from 15 to 50 m.sup.2/g and a compressed oil absorption number (COAN) in a range of from 40 to 100 ml/100 g.

Provided is a run-flat tire. A first bead filler is disposed on an outer circumferential side of a bead core, a second bead filler is disposed on an outer side in a tire width direction of a turned up portion of the carcass layer along the turned up portion of the carcass layer, and a thickness G on a first reference line of a side reinforcing layer, a thickness G1 on a second reference line of the side reinforcing layer, and a thickness G2 on a third reference line of the side reinforcing layer satisfy the relationships of 0.8×G≤G1≤1.0×G and 0.5×G≤G2≤0.7×G.

A tire suitable for running flat comprises a crown, two sidewalls and two beads, a carcass reinforcement with at least one carcass ply anchored in each bead and a sidewall insert placed axially internally relative to at least the carcass ply, wherein the tire is equipped with an electronic device comprising at least one radiofrequency transponder and wherein, each bead comprising a bead wire of revolution about a reference axis and H being one of the points of the bead wire closest to the axis of revolution, the electronic device is placed axially in a zone of the tire bounded by at least one of the beads and one of the sidewalls and radially externally at a radial distance larger than 20 mm from the point H.