Patent ID: 8807666

Claim:
A wheel construction which includes a wheel rim-which in use, at a tire side of the rim, receives a tire, the rim being circular and having axially inner and outer portions, and a mid-portion between the axially inner and outer portions, the mid-portion including a circumferential well where the radius of the wheel rim is a minimum, and each axially inner and outer portion providing a flange, a connecting surface adjoining the flange and extending axially towards the mid portion, the flange and a part of the connecting surface providing a seat for a bead of the tire, and there being a side part between the connecting surface and the mid portion and wherein for at least one of the inner and outer portions, the connecting surface is frusto-conical having an axial end of greatest radius and an axial end of least radius axial end of greatest radius of the connecting surface adjoining the flange, and the side part of the at least one of the axially inner and outer portions including a generally frusto-conical region and a curved region, the frusto-conical region of the side part having an end of greatest radius and an end of least radius, the end of greatest radius of the frusto-conical region of the side part adjoining the connecting surface, and the curved region of the side part including first, second and third axially spaced circumferentially extending concave surfaces, when viewed from the tire side of the rim, the curved region adjoining the end of least radius of the frusto-conical region of the side part and the mid-portion, said frusto-conical region having a surface which is non-parallel to the connecting surface.