Insulator (20) configured to be located on a wheel hub (12) between a
brake rotor (14) and a wheel rim (10), comprising: a disc-shaped annular device with an inner ring (22), an outer ring (24), a first surface section (26), a second surface section (28), a plurality of openings, a plurality of drain surface sections (40) and a plurality of radially oriented drain channels (30) arranged on the first surface section; wherein each of the drainage channels (30) is arranged between adjacent openings; wherein each of the drainage channels (30) is recessed in the first surface section (26), runs between the inner ring (22) and the outer ring (24) and defines a first
radial line; wherein each of the drainage surface sections (40) is recessed in the first surface section (26) and is fluidically coupled to one of the drainage channels (30) to form a coupled drainage channel (30); wherein a first of the drainage surface sections (40) is arranged on a first side of one of the drainage channels (30) and is fluidically coupled to it, and wherein a second of the drainage surface sections (40') is arranged on a second side of one of the drainage channels (30) and is fluidically coupled to it, wherein the first side is opposite the second side of one of the drainage channels (30); wherein a second
radial line is defined by a
radial line that intersects a center line of an adjacent opening (29); wherein a first point (42) is defined on a surface of the first surface section (26) and is located on the second radial line proximal to the inner ring (22); wherein a second point (44) is defined on the surface of the first surface section (26) and is located proximal to one of the drainage channels (30); wherein a curve is formed between the first and second points; and wherein each of the drainage surface sections (40) includes a continuous surface which is recessed by the first surface section (26) between the drainage curve, the drainage channel (30) and an arc defined on the inner ring (22) between the first point and the drainage channel, wherein each point of the run-off curve runs radially above the second point (44) when the second radial line is arranged in a
vertical orientation, wherein the openings (29) comprise tab bolt receiving holes, wherein the openings (29) are arranged symmetrically around a circumference at a common radial length. wherein each of the drainage channels comprises a semi-cylindrical surface which is recessed in the first surface section, wherein the second point (44) is located proximal to the drainage channel at a radial distance midway between the inner ring (22) and the outer ring (24), wherein the second point (44) is arranged proximal to a first side of the drain channel, wherein the inner ring forms a further opening for the wheel hub (12), wherein the first surface section (26) is arranged towards the
brake rotor and the second surface section towards the wheel rim (10).