jarrupainikkeen

Jarrupainikkeen is the Finnish term for a braking lever, a mechanical component used on bicycles, motorcycles, and various motorized vehicles to activate the braking system. The lever is typically located on the handlebars of a bicycle or on the steering column of a motorcycle and is connected to the brake mechanism by a cable or hydraulic line. When the rider pulls the lever, it compresses the brake pads against the rim or disc of the wheel, producing friction that slows or stops the vehicle. The word “jarrupainikkeen” derives from “jarru,” meaning “brake,” and “painike,” meaning “lever” or “switch.”

In bicycle technology, jarrupainikkeet are often paired with rim brakes or disc brakes and may be single-pivot or dual-pivot designs. The lever is calibrated so that a small, precise motion translates into sufficient braking force. Modern bicycles may also feature electronic or electronic-disc braking systems where the lever activates a sensor rather than a mechanical cable.

Motorcycle and off‑road vehicles use jarrupainikkeet that are mounted on the handlebar or center stand, offering riders quick access to the front brake. Some heavy vehicles and trucks employ hydraulic versions where the lever’s movement is relayed to a brake actuator by fluid. The design and torque required for the lever vary depending on the vehicle’s weight and speed characteristics.

Safety regulations in many countries mandate that every bicycle and two‑wheel vehicle include a functioning jarrupainike, and proper maintenance is essential to ensure reliable stopping performance.