Non-pneumatic tire

A structurally supported tire comprising an outer annular band, wherein the annular band further comprises a shear layer, at least a first membrane adhered to a radially inward extent of the shear layer and at least a second membrane adhered to a radially outward extent of the shear layer, wherein each of the membranes has a longitudinal tensile modulus greater than a shear modulus of the shear layer, a plurality of web spokes extending transversely across and radially inward from the outer annular band, said spokes having a maximum width and a radial height, means for interconnecting the plurality of web spokes with a wheel and;

• a plurality of said web spokes has a cutaway section transverse to said band and said cutaway section comprising a profile having;
• a height, a maximum depth greater than five percent of said radial height and less than thirty percent of said maximum width and;
• said profile having a tangent angle at the radially outermost and radially innermost extent of said profile formed by a tangent to said profile and the horizontal wherein said angle alpha is at least equal to ten degrees and;
• a minimum radius of curvature of said profile at least equal to twenty percent of said radial height.