A support assembly for a vehicle includes at least two spherical tires travelling on a road surface and rotating relative to the road surface and the vehicle and a drive system magnetically driving rotation of the tires relative to the drive system itself such that no portion of the drive system physically contacts the tires or the road surface.

A support assembly for a vehicle includes at least two spherical tires travelling on a road surface and rotating relative to the road surface and the vehicle and a drive system magnetically driving rotation of the tires relative to the drive system itself such that no portion of the drive system physically contacts the tires or the road surface. The tires each have an outer tread layer comprising a material having a first stiffness when dry and a second stiffness when wet, the first stiffness being greater than the second stiffness.

A support assembly for a vehicle includes at least two spherical tires travelling on a road surface and rotating relative to the road surface and the vehicle and a drive system magnetically driving rotation of the tires relative to the drive system itself such that no portion of the drive system physically contacts the tires or the road surface. The tires each have an outer tread layer comprising a material having a first stiffness when dry and a second stiffness when wet, the first stiffness being greater than the second stiffness.

A plurality of main grooves extending from a tread center region including a tire equator to ground contact ends so as to be inclined with respect to a tire width direction are provided on a tread section at intervals in a tire circumferential direction. Sub-grooves extending in a direction crossing the tire width direction with a narrower groove width than the main grooves in the tread center region are provided. Tie bars connecting blocks separated by the sub-grooves are provided inside the sub-grooves.

The present application relates to a tire (6) comprising: a tread portion (8) and side walls (10), said tread portion (8) and side walls (10) defining a main air chamber (12); at least two auxiliary chambers (14, 16, 18) formed in the tread portion (8); and an air transfer device (28) for transferring air between the main air chamber (12) and each of the auxiliary air chambers (14, 16, 18).

A rubber composition is based on at least an elastomer, a reinforcing filler, a crosslinking system and a crumb rubber, the said crumb exhibiting: an acetone extract of between 8% and 50% by weight; a chloroform extract such that the ratio of the chloroform extract to the acetone extract, expressed as percentage by weight, is less than 1.5, the chloroform extract exhibiting a weight-average molecular weight (Mw) of less than 10000 g/mol; and a content of plasticizer of greater than 8% by weight in the composition of the crumb.

A pneumatic tire includes bead cores, a carcass ply, an inner liner, and a tread having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5% or less at elongation by an applied stress of 3.0 MPa and a hardness of 65 or more and the crosslinked rubber composition of the present invention having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5 or less at elongation by an applied stress of 3.0 MPa and a hardness of 65 or more are excellent in abrasion resistance.

A pneumatic tire includes bead cores, a carcass ply, an inner liner, and a tread having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5% or less at elongation by an applied stress of 3.0 MPa and a hardness of 65 or more and the crosslinked rubber composition of the present invention having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5 or less at elongation by an applied stress of 3.0 MPa and a hardness of 65 or more are excellent in abrasion resistance.

A method of manufacturing a tread for agricultural tires, the method comprising providing an agricultural tire casing, providing a cured rubber component having first and second planar surfaces, providing a plurality of cushion gums, wherein the plurality of cushion gums contains a cure system comprising a stable dinitrile oxide compound, providing a plurality of lugs, and forming an agricultural tread composite by mating the lugs to a planar surface of the cured rubber component using the cushion gum.

This invention relates to a tire with a tread of a rubber composition that promotes a combination of winter traction at low temperatures and for promoting wet traction. The tread rubber composition contains a combination of low surface area silica and high softening point traction resin. Elastomers for the tread rubber composition are comprised of high cis 1,4-polybutadiene rubber and styrene/butadiene rubber.