Beadlock

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A standard beadlock with tires mounted and bolts tightened.

The same wheel with the tire, bolt and outer ring removed.

A beadlock is a mechanical device that prevents the tire and rim of a wheel from twisting against each other.

Normally, a tire is inflated so that the tire bead is placed on the inside of the rim due to the resulting internal pressure . This keeps the tire on the rim when it rolls and creates a stable axial connection between the two.

However, if the frictional forces between the rim and the tire are insufficient (for example caused by extremely strong acceleration or braking) to prevent the rim and tire from shifting, the connection between the tire and the rim can be established using so-called beadlocks , so that the tire and the rim can no longer move against each other. The slippage of the tire or rim is prevented by fixing the tire on the rim (overall lures is).

There are several types of beadlocks. In four-wheel drive vehicles , a ring with several screws arranged around it is used to connect the tire to the rim. A bead locking means against axial rotation for motorcycles is typically a curved plate with only one screw. For both vehicle types, a kind of inner tube can be used as a beadlock in the tire, which is then inflated to fix it.

A wedge-shaped device with which the cover film of a swimming pool is fixed in the guide rail is also referred to as a beadlock .