A pneumatic tire includes a block pitch length of an outer block row that is greater than a block pitch length of the inner block row. The dimensions in the tire width direction of the regions interposed between two circumferential grooves are smaller in the order of the rib, the outer block row, and the inner block row. The inclined grooves defining and forming the rib open only to the circumferential groove in the vehicle mounting inner side region defining and forming the rib.

A tire includes a tire carcass, and a tread extending circumferentially about the tire carcass and including a noise-reducing tread pattern. The noise-reducing tread pattern includes a plurality of tread elements, with the tread elements having a first pitch length (1), a second pitch length (2), or a third pitch length (3). The noise-reducing tread pattern includes one of the following circumferential configurations: a circumferential row including 40 pitches, with 13 occurrences of 1, 13 occurrences of 2, and 14 occurrences of 3; a circumferential row including 38 pitches, with 10 occurrences of 1, 19 occurrences of 2, and 9 occurrences of 3; a circumferential row including 42 pitches, with 10 occurrences of 1, 19 occurrences of 2, and 13 occurrences of 3; and a circumferential row including 44 pitches, with 11 occurrences of 1, 20 occurrences of 2, and 13 occurrences of 3.

The tread pattern of a tire for a vehicle for agricultural use comprises two rows of lugs (R1, R2), a first row being made up of a circumferential distribution of at least two families of lugs, over one revolution of the wheel; a first family is reproduced with a shortest spacing S, and a second family is reproduced with a longest spacing L; the tread pattern of the tread is designed such that the distance between the axially outer end of a following lug and the axially inner end at the centre of the tread is referred to as the overlap distance R. The ratio of the shortest spacing S of the family of lugs to the longest spacing L, S/L, lies in the range [0.6; 0.8]. The circumferential overlap distance R between the first and second circumferential rows of lugs is constant around the entire circumference of the tire.

A tire includes a tire frame member that is formed from a resin material and has a bead portion, side portions, and a crown portion, a belt layer serving as an example of a reinforcing layer that is disposed at the outer side in a tire radial direction of the tire frame member, and has a higher bending rigidity than outer circumferential portions of the tire frame member, a top tread serving as an example of a tread that is formed from a rubber material and is disposed at the outer side in the tire radial direction of the belt layer, and first width direction grooves serving as an example of width direction grooves that are provided at the top tread. An aperture surface area of one of the first width direction grooves within a total ground contact surface of the tread of one circumferential direction portion of the tire is 0.02% or less relative to a surface area of a total ground contact surface of the tread of one circumferential portion of the tire.

A tyre having a tread is described. The tyre has a central portion located across an equatorial plane, a first shoulder portion located towards an outer side of the tyre and a second shoulder portion located towards an inner side of the tyre. The central portion is separated from the first shoulder portion by two first circumferential grooves. The first shoulder portion and the second shoulder portion have a plurality of first transverse grooves having a first end located substantially at the respective edge of the tread, having a width greater than or equal to about 4 mm and an axial extension equal to at least 50% of the width of the shoulder portion in which they are located.

The tread has main grooves that delimit a central region of a width comprised between 15 and 25% of a total width W and that define the wearable thickness of the tread. The tread also has lateral regions on each side of the central region, and the lateral regions are divided into raised elements. The elongate elements are delimited by oblique secondary grooves which are inclined by a mean angle of between 35 degrees and 55 degrees with respect to the circumferential direction and have a depth P5 which is between 30% and 60% of the depth P. Each elongate raised element has an oblique cut which divides the element into two elongate element halves, and each oblique cut is formed by a sipe extended by an internal canal. The internal canal forms a new groove once the tread is partially worn before the oblique secondary grooves completely disappear.

Provided is a pneumatic tire including: a plurality of land portion rows formed by arranging a plurality of land portions formed by main grooves and transverse grooves in a tire circumferential direction on a tire tread portion, wherein assuming a tire circumferential length of an element formed of the land portion and the transverse groove disposed adjacently to the land portion on one side in the circumferential direction as a pitch length P and the number of pitches which is the number of the elements over the whole circumference of the tire as N, the number of kinds k of pitch lengths P in the circumferential direction is set to N/4 or more and N or less. Assuming the pitch lengths P in a descending order as P.sub.1, P.sub.2, . . . , P.sub.k, a relationship of P.sub.m-1/P.sub.m<1.050 and a relationship of 1.60P.sub.1/P.sub.k<2.00 are satisfied (m: an integer of 2 to k).

A tire includes a tire carcass and a tread extending circumferentially about the tire carcass The tread includes a plurality of tread elements disposed in a tread pattern. The plurality of tread elements have one of two different pitch lengths and are disposed in a noise-reducing pitch sequence.

The invention relates to a tyre with improved performance in terms of transverse grip on snow-covered surfaces without a resulting impairment in performance in terms of grip on wet and dry surfaces. The tread is obtained by repeating the tread pattern elements (MA, MB) at pitches (PA, PB) over a complete circuit of the tyre, with PA<PB. Each first lateral portion (ZB) of said tread pattern elements contains at least one longitudinal sipe (50) of which the path on the tread surface (15) is a mean plane (53) that makes an angle Beta with the circumferential direction, which angle is comprised within the range [0?, 20?]. This same mean plane (53) also makes an angle Alpha with the direction (Npsup) normal to the tread surface (15), which angle is comprised within the range [3?; 55?], and the sum of the projected lengths of the longitudinal sipes (50) in the circumferential direction onto all of the first lateral portions (ZB) is comprised between 0.5 times and 5 times the circumference of the tyre measured in the equatorial plane.

A tire comprises a tread portion provided with a first middle main groove, a second middle main groove, a crown longitudinal groove disposed between the first middle main groove and the second middle main groove, first crown lateral grooves connecting between the crown longitudinal groove and second middle main groove, and second crown lateral grooves connecting between the crown longitudinal groove and the second middle main groove. The first crown lateral grooves and the second crown lateral grooves are arranged so as to be misaligned with each other in the tire circumferential direction. The crown longitudinal groove is provided with at least one crown tie bar formed by raising a groove bottom of the crown longitudinal groove.