Non-pneumatic wheel

1. A non-pneumatic wheel, comprising a hub, an outer tread band and a plurality of spokes connecting the hub with the outer tread band, wherein each spoke of the plurality of spokes comprises:

a first support element extending from the hub and a second support element extending from the tread band that are positioned to form an interior angle, which is an angle of greater than 0 degrees but less than 180 degrees, between a first side of the first support element and a first side of the second support element, wherein the first and second support elements comprise a coating of a first portion of the first and second support elements with a first rubber composition and a remainder portion of the first and second support elements with a second rubber composition;

a first elastomeric joint body formed of a third rubber composition and positioned within the interior angle and connecting the distal ends, the distal ends being those that are opposite from the hub and the tread band ends respectively, of the first and second support elements;

a second elastomeric joint body comprising a fourth rubber composition and connecting a second side of the first support element at its proximal end to the hub;

a third elastomeric joint body comprising a fifth rubber composition and connecting a second side of the second support element at its proximal end to the band, wherein the proximal ends of the first and second support elements are otherwise free ends, and wherein the first, second, third, fourth, and fifth rubber compositions are based on cross-linkable rubber compositions, the first rubber composition comprising, in parts by weight per 100 parts by weight of rubber:

between 50 phr and 100 phr of natural rubber;

between 0 phr and 50 phr of a second rubber component selected from the group consisting of polybutadiene rubber, a copolymer of polybutadiene and styrene wherein the copolymer has no more than 5 mol % styrene and combinations thereof;

between 25 phr and 40 phr of a first reinforcing filler that comprises a first carbon black and a first silica at a carbon black to silica ratio of between 60/40 and 30/70 by weight percent,

wherein the first carbon black has a surface area of between 19 m 2 /g and 39 m 2 /g; and

a cure system for the first rubber composition; and wherein the second rubber composition comprises, in parts by weight per 100 parts by weight of rubber:

between 90 phr and 100 phr of natural rubber;

up to 10 phr of a third rubber component selected from the group consisting of polybutadiene rubber, a copolymer of polybutadiene and styrene wherein the copolymer has no more than 5 mol % styrene and combinations thereof;

between 40 phr and 60 phr of a third reinforcing filler; and

a cure system for the second rubber composition; and wherein the third, fourth, and fifth rubber compositions, which may be the same or different, comprises, in parts by weight per 100 parts by weight of rubber:

between 50 phr and 100 phr of natural rubber;

between 0 phr and 50 phr of a third rubber component selected from the group consisting of polybutadiene rubber, a copolymer of polybutadiene and styrene wherein the copolymer has no more than 5 mol % styrene and combinations thereof;

between 15 phr and 40 phr of a second reinforcing filler that comprises between 2 phr and 6 phr of a second carbon black and between 20 phr and 40 phr of a second silica, wherein the second carbon black has a surface area of between 19 m 2 /g and 39 m 2 /g; and one or more cure systems for the fourth, fifth, and sixth rubber compositions, which cure systems may be the same or different.

2. The non-pneumatic wheel of claim 1 , wherein at least one of the second and third elastomeric joint bodies further comprise a heel at the proximal end of the elastomeric joint bodies, wherein the heel is formed of the second rubber composition, wherein the heel is no more than 25% of the total volume of the at least one of the second and third elastomeric joint bodies.

3. The non-pneumatic wheel of claim 1 , further comprising a reinforcement membrane connecting the second side of the first support element and the second side of the second support element at their distal ends.

4. The non-pneumatic wheel of claim 1 , wherein the first support element and the second support element each further comprise one or more reinforcements coated with the first rubber composition.

5. The non-pneumatic wheel of claim 4 , wherein the one or more reinforcements for each of the first and second support elements are cords of fiber reinforced plastic oriented between the distal and proximal ends of each of the first and second support elements.

6. The non-pneumatic wheel of claim 1 , wherein the first rubber composition includes 100 phr of natural rubber.

7. The non-pneumatic wheel of claim 1 , wherein the carbon black to silica ratio of the first rubber composition is between 55/45 and 45/55 by weight percent.

8. The non-pneumatic wheel of claim 1 , wherein the at least one of the first silica and second silica has a surface area of between 25 m 2 /g and 39 m 2 /g.

9. The non-pneumatic wheel of claim 1 , wherein one or more of the third, fourth or fifth rubber compositions includes 100 phr of natural rubber.

10. The non-pneumatic wheel of claim 1 , wherein one or more of the third, fourth or fifth rubber compositions includes between 25 phr and 35 phr of the second silica.

11. The non-pneumatic wheel of claim 1 , wherein the second rubber composition includes 100 phr of natural rubber.

12. The non-pneumatic wheel of claim 2 , further comprising a reinforcement membrane connecting the second side of the first support element and the second side of the second support element at their distal ends.

13. The non-pneumatic wheel of claim 12 , wherein the first support element and the second support element each further comprise one or more reinforcements coated with the first rubber composition.

14. The non-pneumatic wheel of claim 13 , wherein the one or more reinforcements for each of the first and second support elements are cords of fiber reinforced plastic oriented between the distal and proximal ends of each of the first and second support elements.