Today, not many bikes have dual shocks on the back. Those that do are budget commuter bikes that focus on giving more distance to the fuel burned while still being able to bear as much load as it is forced to carry like a fully laden pony. So, when companies wanted to build bikes for cyclists, they realized that adding monoshocks to the bikes would be a bad idea because they would be subjected to a lot of tension, resulting in more harm than good.
As a result, they opted to use the same dual shocks at the back for commuters and other mid-sports bikes that double as commuters. As a result, several types of dual shocks were developed and are now installed on various bikes based on their cost, planned form of use, and complementing looks. So, in this section, we’ll look at the different kinds of dual shock absorbers available for motorcycles, as follows:
Hydraulic Spring-Loaded Shocks
These are the most common forms of shocks on the market. They were the first type of shocks used, with a hydraulic piston within submerged in hydraulic fluid and a spring charged on the outer end to just provide extra support. These shocks are extremely effective, and their load bearing and bump absorption capabilities can be easily modified by changing and modifying the hydraulic fluid within them with a different viscosity fluid.
These are the most commonly used shocks and can still be found on low-cost commuter bikes today. They are solid, keep the bike steady on the roughest roads, and can handle the heaviest loads.
They also last a long time and need little or no maintenance in most cases, which is fantastic, and they are also inexpensive to manufacture, making them suitable for low-cost bikes.
Gas-filled or Nitrox Shocks
These are the dual variant of the single mono-shocks used on the majority of today’s sports bikes. They operate under the same principle as standard hydraulic suspension systems, with the exception that they use nitrox gas or another gas. The explanation for this is that the gas used has a very loose chemical composition as well as the ability to stretch. As a result, when the bike reaches a bump, the gas inside compresses, absorbing the shocks, and the elastic nature later returns the shocks to their original shape and form.
They have been used in some intermediate performance bikes that are fitted with dual shocks, such as the Hero Karizma R and ZMR series of bikes, because they are very effective in performance areas due to their lighter weight and higher general stability. Harley Davidson rear shocks are most of the time emulsion shocks which work very similar with Nitrox gas.
These were designed and patented by Bajaj Auto in India. They are based on a very basic concept. Instead of hydraulic gases and fluids, it employs a Spring in Spring mechanism in which two springs are linked to each other. This creates two springs supporting the shocks, one on the inside as the main load carrying one and the other as a brace to restrict the spring motion and rebound. The shocks work well and are very capable when using the two springs in this manner.