Heavy vehicle tire with two beads (2) contacting rim (3) an outer face (21), radial carcass reinforcement (4) having carcass layer (41) wound within each bead (2) around bead wire (5) having center (O) to form turnup (411), additional circumferential reinforcement (6), in each bead (2), having additional layer (61, 62), additional reinforcement (6) extending radially from radially inner end (E.sub.1) to radially outer end (E.sub.2) and axially on outerside of axially outermost turnup (411). The orthogonal projection (P.sub.1) of radially inner end (E.sub.1) of additional circumferential reinforcement (6) onto axially outer face (21) of bead (2) is radially on outside of center (O) of bead wire (5), the orthogonal projection (P.sub.2) of radially outer end (E.sub.2) of additional circumferential reinforcement (6) onto axially outer face (21) of the bead (2) contacting point (P.sub.2) of rim (3) that is axially on inside of point (C) of last contact of rim (3) when tire (1) is mounted and inflated, and radial distance (d) between end (E.sub.1) and end (E.sub.2) of additional circumferential reinforcement (6) is at most 20 mm.

A pneumatic tire has a rim strip rubber. A height of the rim strip rubber on the basis of an outer diameter position of a bead core is equal to or more than 70% of a height of a tire outer diameter position. An upper end of a side reinforcing layer is arranged closer to an outer side radially than an upper end of a bead filler. A distance from a tire maximum width position to the upper end of the side reinforcing layer is equal to or less than 5 mm. The maximum thickness Tw of the rim strip rubber between the upper end of the bead filler and the upper end of the side reinforcing layer is greater than the maximum thickness Tm of the rim strip rubber closer to the outer side radially than the upper end of the side reinforcing layer.

The present application relates to the field of tires and provides a passenger all-steel tire and a turn-up process in a building process thereof. It is advantageous to improve tire strength, impact resistance, endurance and prolong service life. A longitudinal section of the passenger all-steel tire comprises a crown (1) located at an outer side of an upper portion, shoulders (2) located on two sides of the crown (1) and connected to the crown (1), a sidewall (3) connected to the shoulder (2), a bead (6) located at a lower portion of the sidewall (3) and matched with a rim, and a carcass (4) located at an inner side of the longitudinal section and the carcass (4) is a ply of all-steel carcass (41).

A pneumatic tire 1 having a toroidal carcass 6 extending from a tread portion 2 through a sidewall portion 3 to a bead core 5 in a bead portion 4, is provided in the bead portion 4 with a bead reinforcing rubber layer 10 along an outer surface in the tire axial direction of the carcass 6. The bead reinforcing rubber layer 10 is formed from a band-like rubber strip 15 wound spirally circumferentially of the tire. In a tire meridian section including the tire rotational axis, each of the inner surface Si and the outer surface So in the tire axial direction of bead reinforcing rubber layer 10 has adjacent rubber strip 15's interfaces 16, and the number of the interfaces 16 on the inner surface Si is smaller than the number of the interfaces 16 in the outer surface So.

A tire having a radial carcass reinforcement, made up of a single layer of reinforcing elements anchored in each of the beads by being turned up around a bead wire, reinforced by a stiffener. The two working crown layers are the only ones present to form the crown reinforcement over at least 75% of the width of the tread, the absolute value of the difference between the absolute values of the angles 2 and 1 being greater than 8, 2 being greater than 1 in terms of absolute value, the mean angle satisfying the relationship 13+131*exp(L/100)<<20+164*exp(L/100), the reinforcing elements of the carcass reinforcement being cords which, in the test referred to as the permeability test, yield a flow rate of less than 20 cm.sup.3/min, a rubber compound being present within the cords, and, in the sidewall of the tire, the profile of the outer surface of the tire is at a constant distance from the carcass reinforcement layer between the points F and A, and meets the outer surface of the bead at the point C, forming two successive circular arcs.

Tire having two beads having an annular reinforcing structure and a carcass reinforcement anchored in the two beads by a turn-up. Each bead has a bead rubber filler extending a radial distance from the radially innermost point of the annular reinforcing structure of the bead. The radial distance is not more than 10% of the tire's radial height. A sidewall has rigidifying metal reinforcing elements oriented along an angle not more than 10 to the circumferential direction and positioned with the distance between the radially innermost point of the annular reinforcing structure and the radially outer end of the rigidifying reinforcement between 20% and 40%, inclusive, of the tire's radial height and with the distance between the radially innermost point of the annular reinforcing structure and the radially inner end of the rigidifying reinforcement not more than 20% of the tire's radial height.

The invention relates to a two-wheeled vehicle pneumatic tire (1), preferably bicycle tire, particularly preferably racing bike tire (1), having a tread (2), a tire carcass, tire side walls (3) and two bead regions (4), each with a tire bead with a core (5), wherein the tire carcass comprises two carcass inlays (6,6) wherein the two carcass inlays (6, 6) extend from a zenith region (17) of the two-wheeled vehicle pneumatic tire (1) over the tire side walls (3) as far as the two bead regions (4) and are looped there around the respective core (5) from axially on the inside axially outward and end with carcass inlay ends (7,7) and wherein the two bead regions (4) each have a bead protective strip (8) arranged on the carcass from the outside as protection against chafing. The problem addressed is that of improving the rolling resistance. The problem is solved in that the carcass inlay ends (7) of the inner carcass inlay (6) are covered from the outside by the respective bead protective strip (8), wherein the inner carcass inlay (6) is formed by that carcass inlay of the two carcass inlays (6, 6) which is the radially inner carcass inlay in the zenith region (17). The invention furthermore relates to a two-wheeled vehicle having a tire of said type.

A pneumatic tire includes a circumferentially continuous recess in at least one sidewall outer surface. In a meridian cross-section, an area A of a region surrounded by outlines of the sidewall and a bead and a tangent line, an area S of a region surrounded by the outlines of the sidewall and the bead, a carcass body, a perpendicular line L2, a perpendicular line L3, and a thickness G1 of a bead filler measured along the perpendicular line L2 satisfy 0.10(G117)A/(S+A)0.05(G110), the tangent line being straight and contacting the outlines of the sidewall and the bead, a contact point being where the tangent line and the sidewall outline contact, the perpendicular line L2 being straight and passing through a turned-up edge of a carcass and perpendicularly intersecting the carcass body, the perpendicular line L3 being straight and passing through the contact point and perpendicularly intersecting the carcass body.

A tire comprises, in the central part of its crown, at least one undulation (51) of the radially outermost crown layer, having a radial amplitude A at least equal to 1 mm. At least one bead comprises, aside from the radial carcass layer and the bead wire, a radial reinforcing element that is such that the axial distance between the radial reinforcing element and the axially innermost carcass layer is at least equal to 1 mm and at most equal to 12 mm at the point of the radial reinforcing element that is situated 30 mm from the radially innermost point of the bead wire, for a better trade-off between the stiffness of the undulating crown and of the bead.