pyöräpolkimien

Pyöräpolkimet, also known as bicycle pedals, are the components of a bicycle that the rider pushes with their feet to propel the bicycle forward. They are crucial for transferring the rider's power to the drivetrain. Pedals are typically mounted on crank arms, which are attached to the bottom bracket of the bicycle frame.

There are several types of bicycle pedals. The most basic are platform pedals, which offer a flat surface for the rider's shoe. These are common on BMX bikes, cruisers, and many entry-level mountain bikes. Another common type is the clipless pedal system. These pedals have a mechanism that engages with a cleat attached to the rider's shoe, securing the foot to the pedal. This provides a more efficient power transfer and allows for pulling up on the pedals in addition to pushing down. Clipless systems are prevalent in road cycling and more advanced mountain biking.

Pedals are usually made from durable materials such as aluminum alloy, steel, or plastic. The choice of pedal can significantly impact a cyclist's comfort, efficiency, and control. The threading on pedals is standardized, with the right-side pedal being a standard right-hand thread and the left-side pedal being a reverse-hand thread to prevent them from loosening as the rider pedals. Maintenance typically involves cleaning and occasional lubrication of the pedal bearings.