Mountain bike suspension plays a crucial role in comfort, control, and performance. The two most common types of rear shocks are air shocks and coil (spring) shocks, each with distinct characteristics and advantages.

Air shocks use compressed air as their spring medium. Their biggest advantage is adjustability: riders can easily change the air pressure with a shock pump to match their weight, riding style, or terrain. Air shocks are also lighter, which makes them popular for cross-country and trail bikes where efficiency and climbing performance matter. Additionally, air shocks tend to have a progressive spring curve, meaning they become firmer deeper into the travel. This helps prevent bottom-outs on hard impacts.

Coil shocks, on the other hand, use a steel or titanium spring. They are known for their plush and consistent feel throughout the travel. Because the spring rate is linear, coil shocks offer excellent small-bump sensitivity and traction, especially on rough and technical descents. This makes them a favorite for downhill, enduro, and bike park riding. However, coil shocks are generally heavier and less adjustable on the fly, as changing the spring rate requires swapping the coil itself.

In summary, air shocks are ideal for riders who value low weight and easy adjustability, while coil shocks excel in delivering maximum sensitivity, consistency, and downhill performance. The best choice depends on the rider’s priorities, riding style, and the type of terrain they ride.