Reservoir shocks are a type of shock absorber that uses a reservoir of hydraulic fluid to dampen the force of impacts. They are commonly used in off-road vehicles and racing cars, as they can provide a smoother ride over rough terrain than non-reservoir shocks.
The main advantage of reservoir shocks is that they can keep the hydraulic fluid cooler than non-reservoir shocks, as the fluid is not in contact with the hot metal components of the shock absorber. This helps to prevent premature wear and tear on the shock absorber, and ensures that it will last longer. Additionally, cooler hydraulic fluid results in better performance from the shock absorber, as it is less likely to foam or cavitate.