lockedwheel

Lockedwheel refers to a situation in cycling where the rear wheel of a bicycle becomes immobilized while the bicycle is still in motion. This can occur due to various mechanical failures or external factors.

One common cause of a locked rear wheel is a drivetrain malfunction. If a chain breaks, jumps off its sprockets, or if a derailleur gets severely damaged, it can jam the rear wheel, preventing it from rotating. Issues with the hub, such as a seized bearing or a problem with the freehub mechanism, can also lead to a locked wheel.

In some cases, external objects can cause a rear wheel to lock. Debris like branches, rocks, or clothing getting caught in the spokes or between the wheel and the frame can impede rotation. In downhill mountain biking or BMX, deliberate locking of the rear wheel, often referred to as a "stoppie" or "wheelie stop," is a maneuver performed by braking sharply and shifting weight, but this is a controlled action and distinct from an unintended lock-up.

A locked rear wheel can lead to a loss of control, making it difficult to steer and potentially causing the rider to fall. Immediate action is required to identify and address the cause of the lock-up to safely bring the bicycle to a stop. This might involve dismounting and inspecting the drivetrain, brakes, and wheel assembly.