Abstract: A segmented tire apparatus includes generally arcuate tire segments each including a radial tread extending along an outer circumference of the respective tire segment. Each tire segment further includes a first group of semi-transverse treads extending from at least adjacent to the radial tread in a first direction and a second group of semi-transverse treads extending from at least adjacent to the radial tread in a second direction. Each one of the second group of semi-transverse treads is positioned in an offset but substantially aligned orientation relative to an associated one of the first group of semi-transverse treads. In an alternative embodiment, a segmented tire apparatus includes a plurality of tire segments mountable onto a rim, with a plate positioned between a first one of the plurality of tire segments and a second one of the plurality of tire segments.

Abstract: The invention provides a heavy duty rim assembly (10) for use with a moulded or cast non-inflatable tyre, a wheel (100) including such a rim assembly and tyre (102), a mould (200) for such a tyre, and a method of manufacturing such a wheel. The rim assembly includes a nave (12) for mounting on a vehicle axle, a hollow barrel (14) around the nave, and a plurality of key members (16) around the barrel. The key members, in use, provide for effective bonding and keying of the rim assembly with the non-inflatable tyre. The key members define a belt (46) around the barrel, the belt being at least substantially concentric with and spaced apart from the barrel. The key members define holes (36) therethrough for tyre material to extend through in a completed wheel.