When?
- After a road with glass or stones
- A flattened tread
- Cracks on the sidewall
How?
- Turn the wheel slowly and look all around the tyre.
- Note any glass or thorns; if deep, don’t pull them out.
What does it depend on?
How often depends on how much and where you ride, the weather, the component and the manufacturer’s instructions. Instead of a fixed schedule, look for the signs above.