Achterassen

Achterassen, or rear axles, are the assemblies that connect the rear wheels to the drivetrain and transmit driving torque from the differential to the wheels. They also support the vehicle’s weight through the suspension. The term is used in automotive contexts as well as in bicycles, where it refers to the rear wheel axle.

In motor vehicles, rear axles come in two main configurations. A solid rear axle (live axle) is a rigid axle housing that carries the differential and connects both wheels; the suspension often uses leaf springs or coil springs. An independent rear suspension (IRS) uses separate wheel carriers connected to the chassis by individual arms, with the differential either mounted in the axle housing or nearby; this design reduces unsprung weight and improves ride and handling.

For bicycles, the rear axle passes through the rear hub and secures the wheel to the frame. Modern bicycles use different mounting systems, including solid axles with nuts, quick-release skewers, and through-axle designs; the choice affects stiffness and hub compatibility. In both cases, the rear axle must withstand longitudinal torque, lateral forces, and braking stresses.

Maintenance involves regular inspection for wear, proper lubrication of any bearings or differential oil in motor vehicles, checking seals for leaks, and ensuring correct torque on axle nuts or bolts. Common issues include worn or leaking axle seals, excessive play in wheel hubs, or differential gear wear, which can affect handling and safety.