A motorcycle tire includes a tread portion, a pair of sidewall portions, a pair of bead portions, and a carcass extending between the bead portions in a toroidal manner. Each of the sidewall portions is provided with a sidewall rubber. In each of the sidewall portions, a minimum thickness (Ts) is 50% or less of a minimum tire thickness (Ta) from a respective one of tread edges to a tire inner cavity surface. A minimum thickness (Ds) of the sidewall rubber is from 0.3 to 1.9 mm.

The invention relates to a tyre (1) for a passenger vehicle of which the performance in terms of rolling resistance has been improved without adversely affecting the transverse slip stiffness. The bead (50) is made more flexible by the use of low-hysteresis materials. The transverse slip stiffness is compensated for through the use of a rigid, low-hysteresis sidewall layer (30). The layers of compounds of the lower region having a viscoelastic loss Tan(?)max less than or equal to 0.10 represent a volume of between 30% and 90% of the total volume of said lower region, and the elastic shear modulus G (M3) of each sidewall layer is in the range [0.5; 10] MPa.

A tire (1) for an electrically assisted bicycle or wheelchair having tire a crown reinforcement, which is radially on the inside of a tread, with the tread being connected to two beads via two sidewalls. The tire has, on at least one of the sidewalls (3) and protruding from the sidewall, a strip (4) of a rubber compound with an axial thickness (ep) that is at least equal to 1 mm and at most equal to 4 mm, at least equal to 10 mm and at most equal to 30 mm. The rubber compound has a Shore A hardness of between 55 and 75, and a glass transition temperature of between ?15? C. and 0? C. The compound forms a smooth outer surface (5) that is intended to come into contact with a drive roller bearing a plurality of indenting elements.

The rolling resistance of a tire has been improved without degrading industrial performance. The sidewall (30) consists of two sub-layers. A first sub-layer (FE1) of thickness E1 and volume V1 provides the expected protection functions of a sidewall as the outer wall of the tire, and a second sub-layer of the sidewall (FE2) of thickness E2 and volume V2 is optimized at low hysteresis to improve rolling resistance. The ratio V1/(V1+V2) of the volumes of the two sub-layers (FE1, FE2) is less than or equal to 0.3. The elongation at break of the compound of FE1 is greater than or equal to 200% measured at a temperature of 100? C., and the viscoelastic loss of the compound of FE2, Tan(?)max, is less than or equal to 0.10.

Provided is a tire manufacturing feature in which even when an electronic component is embedded in a tire, damage due to impact load during traveling on the road surface is inhibited and the durability of the tire is prevented from deteriorating. A pneumatic tire provided with: a bead reinforcing layer provided in the tire-axial-direction outer side of the carcass of a bead part the bead reinforcing layer reinforcing the bead part from the outer side of the carcass; a clinch member provided on the tire-axial-direction outer side of the bead reinforcing layer; and an electronic device. The clinch member has a rigidity lower than that of the bead reinforcing layer, and the electronic component is embedded between the bead reinforcing layer and the clinch member.

Provided is a tire on which cracks on sidewall portion outer surfaces are unlikely to progress. The tire comprises a depthwise part I from a point on a sidewall portion outer surface to 0.5 mm on at least a part of a sidewall portion, wherein: the depthwise part I satisfies the following requirement: the depthwise part I: comprising a natural rubber, a butadiene rubber, and a thermoplastic elastomer; a peak temperature T1 ( C.) of tan is 20 C. or more and 5 C. or less; and when tan at the peak temperature T1 ( C.) is 1 and a storage modulus at the peak temperature T1 ( C.) is E1 (MPa), 10.90 and E1MPa.

A tire may include: a tread cap; a carcass that comprises a radially outermost ply; a belt structure interposed between the carcass and the tread, the belt structure comprising a radially innermost belt; a pair of sidewall portions, wherein radially outermost portions of each sidewall overlie lateral end portions of the tread cap; a pair of bead regions, wherein the radially innermost belt wraps around the bead regions; a pair wraparound gum layers, wherein each wraparound gum layer wraps around a lateral end portion of the radially innermost belt; and a pair of sidewall gum layers that each extend along an outer surface of the radially outermost ply, wherein a first end of each sidewall gum layer is between the radially outermost ply and the lateral end portion of the radially innermost belt and a second end of each sidewall gum layer is at the bead region.

The present invention provides a pneumatic tire having excellent fuel efficiency, handling stability, and ride quality while maintaining a good balance between them. Provided is a pneumatic tire including a tire component formed from a rubber composition, the rubber composition having cured rubber properties satisfying predetermined values.

Provided is a pneumatic tire which comprises a pair of left and right bead portions, sidewall portions continuous from the bead portions, and a tread portion that couples the sidewall portions. The pneumatic tire has a carcass layer mounted between the left and right bead portions. The sidewall portions each have a foamed rubber layer disposed outside the carcass layer and a side rubber layer disposed outside the foamed rubber layer. The density of the foamed rubber layer is from 0.5 to 0.9 g/cm.sup.3 and a tan of the foamed rubber layer at 20 C. is not greater than 0.17. A rubber composition for sidewalls that forms the side rubber layer is obtained by blending from 1 to 20 parts by weight of a thermoplastic resin and from 10 to 65 parts by weight of a carbon black in 100 parts by weight of a diene rubber.

In a tire 2, each of sidewalls 6 includes a first layer 36 disposed axially outward of a corresponding one of beads 8, and a second layer 38 extending outward from the first layer 36 in a radial direction. When Pc represents a position of an axially outer end of an interface between a carcass 10 and the sidewall 6, an outer end 40 of the first layer 36 is disposed radially inward of the position Pc. A hardness H1 of the first layer 36 is greater than a hardness H2 of the second layer 38. A ratio (H2/H1) of the hardness H2 to the hardness H1 is preferably not less than 0.70 and preferably not greater than 0.95.