Suspension components are the most variable on a bike – each manufacturer has a different way of building and maintaining their forks and rear shocks. This makes it hard to give specific advice, but there are some common elements to all systems.
|Fork loses pressure
The ride gets harsher, or the front of the bike seems lower than normal.
|Rear shock loses pressure
The bike sags more than you expect, bumps are harsher, and pedalling gets harder.
|Shock bolt breaks
Although it sounds catastrophic, you may not realize the bolt is broken because the rest of the bearing/bushing pieces may hold it in. A “noodly” feeling frame is one indication.