For vehicles that are operating in soft terrain like mud or snow the vehicle will need more mobility and this is why the tires footprint is increased. This can be done by decreasing the air pressure of the tires. A 4x4 with lower tire air pressure the foot print will exceed that of an 8x8 at full service pressure. The mobility is only achieved if all the tires are fitted with a device that offers tires bead locking. The Hutchinson Rock Monster Beadlock offers just that. On top of the excellent functionality, these wheels are also cast made of an aluminum alloy for durability. To assemble it you have studs, locking nuts and an o-ring seal.