A rim (3) for a rolling assembly has a flexible extender, the rim having an axis of rotation DD, said rim having a rim seat (31) extended axially towards the outside by a rim flange (32), said rim flange (32) having a first portion (321) that is oriented substantially in a plane perpendicular to the axis of rotation DD and situated radially on the outside with respect to said rim seat (31), said first portion (321) being extended radially and axially towards the outside by a connecting portion, characterized in that the radial height measured between the intersection point between the line of the rim seat and the line of the first portion, and the end of the radially outermost portion of the rim flange (32) is less than 10 mm.

A rim (3) for a rolling assembly has a flexible extender, the rim having an axis of rotation DD, said rim having a rim seat (31) extended axially towards the outside by a rim flange (32), said rim flange (32) having a first portion (321) that is oriented substantially in a plane perpendicular to the axis of rotation DD and situated radially on the outside with respect to said rim seat (31), said first portion (321) being extended radially and axially towards the outside by a connecting portion, characterized in that the radial height measured between the intersection point between the line of the rim seat and the line of the first portion, and the end of the radially outermost portion of the rim flange (32) is less than 10 mm.

A rolling assembly comprises a tire (2) having two beads (21), a rim (3) and at least one flexible extender (1) intended to provide the connection between one of the beads (21) and the rim (3), the rim having a rim flange (32), said extender (1) comprising an axially inner end (10), an axially outer end (11) and a body (12) that is oriented mainly axially and is disposed between said axially outer end (11) and said axially inner end (10), said axially inner end (10) being fixed in place on said rim, said extender (1) having an extender seat (13) intended to receive a tire (2) bead (21), said extender seat being extended axially towards the outside by a shoulder that axially fixes said tire (2) bead (21) in place, said tire (2) bead (21) having an axial width WB at the interface of the bead (21) with the extender seat (13), characterized in that said rim flange (32) extends axially under the bead (21) by a distance S such that the ratio S/WB is greater than 0.1.

A rolling assembly comprises a tire (2) having two beads (21), a rim (3) and at least one flexible extender (1) intended to provide the connection between one of the beads (21) and the rim (3), the rim having a rim flange (32), said extender (1) comprising an axially inner end (10), an axially outer end (11) and a body (12) that is oriented mainly axially and is disposed between said axially outer end (11) and said axially inner end (10), said axially inner end (10) being fixed in place on said rim, said extender (1) having an extender seat (13) intended to receive a tire (2) bead (21), said extender seat being extended axially towards the outside by a shoulder that axially fixes said tire (2) bead (21) in place, said tire (2) bead (21) having an axial width WB at the interface of the bead (21) with the extender seat (13), characterized in that said rim flange (32) extends axially under the bead (21) by a distance S such that the ratio S/WB is greater than 0.1.

A puncture resistant wheel apparatus, and method of use, for safely climbing obstacles are disclosed herein. A plurality of wheel apparatuses is mounted on a vehicle (e.g. a wheelchair, cart, mountain bicycle, etc.) to enable it to safely traverse obstacles, such as a flight of stairs, road curbs, etc. without slipping, and while creating a smoother ride. Each wheel apparatus comprises: a tire comprising a plurality of teeth sections separated via a thin space to grip an obstacle edge between the teeth; a circular rim attachable to the tire inner surface via T-joints, and a plurality of evenly spaced spokes extending to a central hub; and two hoop rings, mounted on opposing tire sidewalls. The center of each tire tooth section further comprises an elastic unit, comprising a vertical spring and two horizontal springs that further act to dampen the vibrational and jarring forces exerted on the wheel apparatus.

A rim (3) for a tire has an axis of rotation DD and a rim seat (31) extended axially towards the outside by a rim flange (32), said rim flange (32) having a first portion (321) that is oriented substantially in a perpendicular plane and is situated radially on the outside with respect to said rim seat (31), characterized in that said rim flange (32) has a second portion (322) that is inclined towards the outside, is situated axially on the outside with respect to said first portion (321) and is situated at least partially radially on the outside with respect to said rim seat (31), said rim having a connecting portion (320) between said first portion (321) and said second portion (322).

A rim (3) for a tire has an axis of rotation DD and a rim seat (31) extended axially towards the outside by a rim flange (32), said rim flange (32) having a first portion (321) that is oriented substantially in a perpendicular plane and is situated radially on the outside with respect to said rim seat (31), characterized in that said rim flange (32) has a second portion (322) that is inclined towards the outside, is situated axially on the outside with respect to said first portion (321) and is situated at least partially radially on the outside with respect to said rim seat (31), said rim having a connecting portion (320) between said first portion (321) and said second portion (322).

A wheel assembly including a substantially cylindrical rim base with a varying thickness having first and second opposed annular edges, the rim base comprising first and second annular flanges formed on an outside surface of the rim base and respectively positioned at a distance set back from the first and second annular edges, each of the first and second annular flanges forming a first and second annular seat; first and second lock rings being substantially flat having a contact surface and an exterior surface, the contact surface of each lock ring configured to abut the respective annular edge; and a locking mechanism configured to removably secure the first and second lock rings to the first and second annular edges.

A wheel assembly including a substantially cylindrical rim base with a varying thickness having first and second opposed annular edges, the rim base comprising first and second annular flanges formed on an outside surface of the rim base and respectively positioned at a distance set back from the first and second annular edges, each of the first and second annular flanges forming a first and second annular seat; first and second lock rings being substantially flat having a contact surface and an exterior surface, the contact surface of each lock ring configured to abut the respective annular edge; and a locking mechanism configured to removably secure the first and second lock rings to the first and second annular edges.

The present invention relates to a novel design for quick tyre change in rear dual wheel assembly in a heavy transport vehicle. The invention provides a safe design that comprises a two-piece segmented saddle lock ring retained in position by an endless ring. A self-locking taper provided on the inside of endless ring can be pressed against the taper provided on the two-piece segmented saddle lock ring. The endless ring retaining the two-piece segmented saddle lock rings due to wedge action of self-locking taper cannot move from its position until an external force is applied on the endless ring towards the direction of the tyre position. The endless ring acts as a hood over the two-piece segmented saddle lock rings and prevents any loose parts flying off the rim during the tyre burst. Further in this safe design both inboard and outboard rim tyre support components are identical as both rims are of same diameter.