In the context of motorcycles, a twin shock refers to a suspension setup that utilizes two shock absorbers, one on each side of the rear wheel. This design was prevalent in motorcycles during the mid-20th century, particularly in the 1960s and 1970s.
Twin shocks are also commonly referred to as dual shocks or twin rear shocks. They were commonly found on a wide range of motorcycles, including street bikes, cruisers, and even some off-road motorcycles.
The twin shock setup consists of two separate shock absorbers, each attached to the motorcycle frame and connected to the swingarm. The swingarm connects the rear wheel to the motorcycle frame and allows it to move vertically in response to bumps and uneven surfaces.
The primary purpose of the twin shock suspension is to absorb and dampen the impacts and vibrations transmitted through the rear wheel, improving ride comfort and stability. The twin shocks work in conjunction with the front suspension to provide a balanced and controlled ride.
Many motorcycles now feature more advanced suspension systems, such as mono-shock setups, where a single shock absorber is mounted centrally on the motorcycle's rear. Mono-shocks offer advantages in terms of adjustability, performance, and weight savings.
While twin shock suspensions may not be as prevalent today, they remain iconic and are still utilized in certain classic or retro-style motorcycles, where manufacturers aim to evoke a nostalgic aesthetic.