Heavy-duty pneumatic radial tire and wheel rim assembly with support ring

A heavy-duty pneumatic radial tire comprising

• a tread portion with an outside tread edge and an inside tread edge,
• an outside sidewall portion extending radially inwardly from the outside tread edge,
• an inside sidewall portion extending radially inwardly from the inside tread edge,
• an outside bead portion with an inner diameter Do at the radially inner end of the outside sidewall portion,
• an inside bead portion with an inner diameter Di at the radially inner end of the inside sidewall portion, wherein
• the diameter Do is substantially between 80 mm and 200 mm larger than the diameter Di,
• the difference (Do- Di) therebetween is in a range of from 35% to 55% of the tire maximum width W, and
• said tread portion is provided with an outside tread surface defined between the tread center and the outside tread edge and an inside tread surface defined between the tread center and the inside tread edge, wherein a radius of curvature of the outside tread surface is between 50 mm and 100 mm larger than a radius of curvature of the inside tread surface.

An assembly of a heavy-duty pneumatic radial tire, a wheel rim and a support ring to be disposed in the tire to support the tire in a deflated condition,

• said heavy-duty pneumatic radial tire comprising
• a tread portion with an outside tread edge and an inside tread edge,
• an outside sidewall portion extending radially inwardly from the outside tread edge,
• an inside sidewall portion extending radially inwardly from the inside tread edge,
• an outside bead portion with an inner diameter Do at the radially inner end of the outside sidewall portion,
• an inside bead portion with an inner diameter Di at the radially
• inner end of the inside sidewall portion, wherein
• the diameter Do is substantially between 80 mm and 200 mm larger than the diameter Di, and
• the radius of curvature of an outside tread surface between the tread center and the outside tread edge is between 50 mm and 100 mm larger than the radius of curvature of an inside tread surface between the tread center and the inside tread edge.

An assembly of a heavy-duty pneumatic radial tire, a wheel rim and a support ring to be disposed in the tire to support the tire in a deflated condition, said heavy-duty pneumatic radial tire comprising

• a tread portion with an outside tread edge and an inside tread edge,
• an outside sidewall portion extending radially inwardly from the outside tread edge,
• an inside sidewall portion extending radially inwardly from the inside tread edge,
• an outside bead portion with an inner diameter Do at the radially inner end of the outside sidewall portion,
• an inside bead portion with an inner diameter Di at the radially inner end of the inside sidewall portion, wherein
• the diameter Do is substantially between 80 mm and 200 mm larger than the diameter Di,
• the difference (Do−Di) therebetween is in a range of from 35% to 55% of the tire maximum width W, and
• the radius of curvature of an outside tread surface between the tread center and the outside tread edge is between 50 mm and 100 mm larger than the radius of curvature of an inside tread surface between the tread center and the inside tread edge.