sentences:  On ATV's (and UTV's/side-by-sides) this bead retainer is substantially large because these tires are often run at very low air pressures (~5 psi) and experience severe side loading forces from typical trail riding.The large bead retainer is necessary to prevent unintentional dislocation of the tire bead from the bead seat.Further, if an ATV tire does lose pressure from a puncture, the large bead retainer will keep the Tire in place for low speed riding allowing the operator to navigate to the trail head without the tire coming completely off of the rim.