The present invention relates to a tyre for bicycle wheels comprising a tread band containing an anti-puncture system capable of offering high resistance to the penetration of foreign bodies. In particular, the present invention relates to a tyre (100) for bicycle wheels comprising:—a carcass structure (2); and—a tread band (7) arranged in a radially outer position with respect to said carcass structure (2); characterised in that said tread band (7) is made by vulcanisation of a vulcanisable elastomeric compound comprising fibrillated polymeric fibres of micrometric dimensions, wherein at least one protective layer (6, 11) is interposed between said carcass structure (2) and said tread band (7), said protective layer (6, 11) comprising (i) a plurality of reinforcing cords of textile material oriented with respect to the equatorial plane of the tyre with an angle greater than 30°, (ii) a square fabric with textile fibres of the weft or warp oriented with respect to the equatorial plane of the tyre with an angle greater than 20°, or (iii) a non-woven fabric with randomly oriented textile fibres.

Provided is a pneumatic tire. Both terminals of a carcass layer are overlapped with each other in a tread region. The carcass layer has a triple layer structure including an inner layer positioned most inward in a tire radial direction in the tread region, an outer layer positioned most outward in the tire radial direction in the tread region, and an intermediate layer positioned between the inner layer and the outer layer in the tread region. A cord angle in the carcass layer in a tread central region with respect to a tire circumferential direction differs in at least one of the inner layer, the outer layer, and the intermediate layer from a cord angle in the carcass layer in a side region with respect to the tire circumferential direction.

A shear band for a tire includes a first belt layer extending circumferentially around the tire, a second belt layer extending circumferentially around the tire, and a shear band coupon radially interposed between the first belt layer and the second belt layer. The shear band coupon includes a first reinforcing ply radially adjacent the first belt layer, a third reinforcing ply radially adjacent the second belt layer, and a second reinforcing ply radially interposed between the first reinforcing ply and the second reinforcing ply. The first reinforcing ply includes a first three dimensional layer enclosed by a first fabric layer. The second reinforcing ply includes a second three dimensional layer enclosed by a second fabric layer. The third reinforcing ply includes a third three dimensional layer enclosed by a third fabric layer.

A shear band for a tire includes a first belt layer extending circumferentially around the tire, a second belt layer extending circumferentially around the tire, and a shear band radially interposed between the first belt layer and the second belt layer. The shear band includes a first reinforcing ply radially adjacent the first belt layer, a third reinforcing ply radially adjacent the second belt layer, and a second reinforcing ply radially interposed between the first reinforcing ply and the second reinforcing ply. The first reinforcing ply includes a first flattened, braided tube layer enclosed by a first rubber layer. The second reinforcing ply includes a second flattened, braided tube layer enclosed by a second rubber layer. The third reinforcing ply includes a third flattened, braided tube layer enclosed by a third rubber layer.

A tire includes a carcass ply, a tread disposed radially outward of a crown region of the carcass ply, and a belt structure having an overall axial width substantially equal to a tread width interposed between the tread and the crown region in circumferential surrounding relation to the carcass ply. The belt structure includes a first belt layer and a second belt layer radially adjacent the first belt layer. The first belt layer includes a first reinforced composite with first reinforcement cords embedded in a first rubber matrix. The first reinforcement cords have a construction of 1100/4 dtex with a twist between 150 TPM and 250 TPM and a dipping tension between 100 mN/tex and 200 mN/tex.

A pneumatic tire for use on trucks, the tire comprising: a tread which includes a belt reinforcement structure of only three belts, the belt structure including a pair of working belts, wherein the angle of the working belts range from about 12 degrees to about 35 degrees, wherein a low angle belt is positioned preferably between of the working belts, wherein the angle of the low angle belt is less than 5 degrees. The working belts are made of high elongation wire having an elongation at break greater than 3.5%.

A pneumatic tire is described which includes a tread, a carcass and a belt structure interposed between the carcass and the tread. The belt structure includes a first and second working belt, wherein the angle of the working belts range from about 12 degrees to about 35 degrees, wherein the belt structure further includes a low angle belt located radially inward of the working belts. The first working belt is the radially innermost working belt, and is the widest belt. The second working belt is the radially outermost belt. The pneumatic tire may further include a second optional low angle belt, that is located between the first low angle belt and the first working belt.

In a tire 2, in a normal state, a profile of a tread surface 22 includes a crown circular arc as a circular arc representing a profile of a portion including an equator PC, and the crown circular arc has a radius of not less than 1600 mm and not greater than 2000 mm. On a ground-contact surface 52 obtained when a load is applied to the tire 2 in the normal state and the tread surface 22 is brought into contact with a flat road surface, an ultra-light load shape index F30 is higher than a light load shape index F60, the ultra-light load shape index F30 is not less than 1.10 and not greater than 1.20, and the light load shape index F60 is not less than 1.04 and not greater than 1.14.

On a pneumatic tire are defined a first imaginary line VL1 passing through a ground contact surface in a meridian cross section of a tread portion, a second imaginary line VL2 passing through a bottom portion of a shoulder main groove and parallel to VL1, an intersection point P between VL2 and a surface of a shoulder land portion outward from a ground contact edge in a lateral direction, and an equatorial plane CL. 0.80≤(B+C)/A≤1.15 is satisfied, where A represents a distance in the lateral direction between P and CL, B represents a depth of the shoulder main groove, and C represents a distance in the lateral direction between the ground contact edge and CL. 0.75≤S/A≤0.95 is satisfied, where S represents a distance in the lateral direction between CL and an end portion of a longest belt ply in the lateral direction.

The invention relates to a radial pneumatic tire (1) for a heavy-duty civil engineering vehicle and aims to reduce the risk of tread separation of the pneumatic tire, during driving on sharp rocks, while ensuring good resistance to cracking of the crown reinforcement. The pneumatic tire (1) comprises a protective reinforcement (5) comprising two protective layers (51, 52), the radially innermost protective layer (51) comprising elastic metal reinforcements with a diameter D1 which are axially distributed according to an axial pitch P1, and the radially outermost protective layer (52) comprising elastic metal reinforcements with a diameter D2 which are axially distributed according to an axial pitch P2. According to the invention, the following relations are satisfied:

D1>D2

P1>P2

P1>=1.2*D1 et P2>=1.2*D2

2.5<=(DI*P1)/(D2*P2)<=5