A process for manufacturing a light-alloy hybrid wheel, implements the following separate operation phases: making a flange with an internal profile capable of constituting a tire bead seat; making a rim with, on one side, an outer profile capable of constituting a tire bead seat and, on the other side, a circular flank for assembly with a part of the flange; and assembling the flange with the rim, at the seat of said flange and the circular flank of the rim. The rim is made according to the following consecutive operations: an operation of manufacturing a circular flank; then an operation of expanding said circular flank to the size of the final rim in a single step; then an operation of cold or hot flospinning of said circular flank so as to obtain the rim in the final shape and profile thereof, comprising a shoulder only on the side that will not be welded to the flange.

A vehicle wheel includes a wheel substrate made of metal and a colored coating layer located on a surface of the wheel substrate. An outer side surface of the wheel includes a first region, a second region, and a groove located between the first and second regions. The colored coating layer covering the wheel substrate is located over the groove. A color of the surface of the wheel substrate is visible at least in the first or second region.

The invention is directed to a wheel comprising a rim (2) and a wheel center (3) interconnected to the rim (2). The rim (2) comprises at least one first contact area (12) and the wheel center (3) comprises at least one second contact area (13) which in a mounted state are aligned with respect to each other. According to the invention an intermediate layer (22) is arranged between the at least one first contact area (12) and the at least one second contact area (13) preventing at least partially direct contact between the at least one first contact area (12) and the at least one second contact area (13).

A method for manufacturing a one-piece wheel by forging includes: producing an integral forging comprising: a disc portion, a rim portion, and an annular protrusion protruding from one side of the disc portion in a forging method; producing an outer bend by bending the annular protrusion through a flow-forming process; and forming a hollow portion by welding one end of the outer bend to one side of the rim portion. The method manufactures the one-piece wheel having stronger shear strength and stiffness and better fatigue life even while reducing the noise using the forging method.

Disclosed is a method for producing a vehicle wheel with a connection between a wheel rim and a wheel disc in which the wheel disc is connected to the wheel rim by means of at least one connecting element that is guided through a through-hole of the rim base and is joined in the wheel disc. After the joining of the connecting element in the wheel disc a portion of the head of the connecting element projects beyond the rim base on the outer side of the rim. Subsequently the head of the connecting element is at least partially removed.

A wheel disc for a disc wheel, especially for utility vehicles; with an essentially radially extending hub fitting flange and an essentially cylindrical disc edge which can be joined to a wheel rim, and with a transition region extending between the hub fitting flange and the disc edge, wherein the transition region is subdivided into at least five segments (Ai to v) passing into each other or into the hub fitting flange or the disc edge, each of which has an outer end situated closer to the hub fitting flange and an inner end situated closer to the disc edge, wherein neighbouring segments have curvatures with different directions and variable material thickness, with the ratios of the material thicknesses and the ratio of their lengths to heights are chosen as follows:

TABLE-US-00001 Material thickness of Length in axial inner end direction Material thickness of Height in radial outer end direction Segment A.sub.I 0.45-0.7  0.9-1.1 (between hub fitting flange and segment A.sub.II) Segment A.sub.II 0.7-1.0  1.6-1.9 (between A.sub.I and A.sub.III) Segment A.sub.III 0.9-1.25 2.5-2.8 (between A.sub.II and A.sub.IV) Segment A.sub.IV 0.9-1.25 2.8-3.1 (between A.sub.III and A.sub.V) Segment A.sub.V 0.7-1.15 6.0-6.8 (between A.sub.IV and disc edge)

A wheel disc for a disc wheel, especially for utility vehicles; with an essentially radially extending hub fitting flange and an essentially cylindrical disc edge which can be joined to a wheel rim, and with a transition region extending between the hub fitting flange and the disc edge, wherein the transition region is subdivided into at least five segments (Ai to v) passing into each other or into the hub fitting flange or the disc edge, each of which has an outer end situated closer to the hub fitting flange and an inner end situated closer to the disc edge, wherein neighbouring segments have curvatures with different directions and variable material thickness, with the ratios of the material thicknesses and the ratio of their lengths to heights are chosen as follows:

TABLE-US-00001 Material thickness of Length in axial inner end direction Material thickness of Height in radial outer end direction Segment A.sub.I 0.45-0.7  0.9-1.1 (between hub fitting flange and segment A.sub.II) Segment A.sub.II 0.7-1.0  1.6-1.9 (between A.sub.I and A.sub.III) Segment A.sub.III 0.9-1.25 2.5-2.8 (between A.sub.II and A.sub.IV) Segment A.sub.IV 0.9-1.25 2.8-3.1 (between A.sub.III and A.sub.V) Segment A.sub.V 0.7-1.15 6.0-6.8 (between A.sub.IV and disc edge)

A bicycle disc wheel or spoked wheel (10) is disclosed, comprising a hub (12), a rim (14) and at least one disc or spoke-type structural element (60) integral with the hub (12) and the rim (14), wherein said at least one structural element (60) is pretensioned. A process for manufacturing thereof comprises the sequential steps of providing a hub (12) and a rim (14), applying a compression on the rim (14) towards the hub (12) elastically deforming it, rendering at least one disc or spoke-type structural element (60) integral with the hub (12) and the rim (14), and removing the compression onto the rim (14) applied in step a).

A bicycle disc wheel or spoked wheel (10) is disclosed, comprising a hub (12), a rim (14) and at least one disc or spoke-type structural element (60) integral with the hub (12) and the rim (14), wherein said at least one structural element (60) is pretensioned. A process for manufacturing thereof comprises the sequential steps of providing a hub (12) and a rim (14), applying a compression on the rim (14) towards the hub (12) elastically deforming it, rendering at least one disc or spoke-type structural element (60) integral with the hub (12) and the rim (14), and removing the compression onto the rim (14) applied in step a).

Disclosed herein is a wheel, in particular for vehicles, such as motor vehicles, with a rim ring having an opening defined there through, and with a main support at least partially arranged in the opening in the rim ring. The wheel, despite having a low weight, provides adequate rigidity and strength and can be produced in a simple manner, while maintaining design flexibility. The main support of the wheel has a plurality of spokes, and a plurality of covering parts for at least partially covering the spokes, wherein the main support and the covering parts support the rim ring.