Tire to rim rotation limiter for a run-flat assembly

A tire apparatus for driving a vehicle during periods of low tire pressure and normal tire pressure, comprising:

• a rim having a first bead seat and a second bead seat, and said rim having a cylindrical section intermittent said first and second bead seats, said rim configured for attachment to a wheel of the vehicle;
• a support ring disposed on said cylindrical section of said rim, said support ring configured for supporting the vehicle during periods of low tire pressure;
• a tire having a tread portion and a pair of side walls adjacent said tread portion, said tire having a first bead at one end of one of said side walls and a second bead at one end of the other of said side walls, said first bead disposed in said first bead seat and said second bead disposed in said second bead seat, at least one of said first and second bead seats having grit disposed thereon to prevent relative rotational movement between said tire and said rim, said first bead and said first bead seat forming a first air seal zone and said second bead and said second bead seat forming a second air seal zone, said grit being spaced from at least one of said first and second air seal zones;
• and
• wherein said grit is disposed around the entire circumference of said at least one of said first and second bead seats.

A tire apparatus for driving a vehicle during periods of low tire pressure and normal tire pressure, comprising:

• a rim having a first bead seat and a second bead seat, and said rim having a cylindrical section intermittent said first and second bead seats, said rim configured for attachment to a wheel of the vehicle;
• a support ring disposed on said cylindrical section of said rim, said support ring configured for supporting the vehicle during periods of low tire pressure;
• and
• a tire having a tread portion and a pair of side walls adjacent said tread portion, said tire having a first bead at one end of one of said side walls and a second bead at one end of the other of said side walls, said first bead disposed in said first bead seat and said second bead disposed in said second bead seat, at least one of said first and second bead seats having grit disposed around the entire circumference of said at least one of said first and second bead seats to prevent relative rotational movement between said tire and said rim, said first bead and said first bead seat forming a first air seal zone and said second bead and said second bead seat forming a second air seal zone, said grit being spaced from said first and second air seal zones, and the presence of said grit increases the amount of mass of said rim.