To ensure that the **spare wheel** is always ready for use, it is important to inflate it to the **highest pressure** specified by the manufacturer. This is due to several reasons:

- **Correct inflation pressure:** Tires must have the appropriate pressure to be more resistant and better support the vehicle's load. The manufacturer specifies the amount of air needed for each tire, and it is crucial to follow these indications to maintain the vehicle's safety and performance.

- **Advantages of higher pressure in the spare wheel:** By inflating the spare wheel to the highest recommended pressure, it ensures that even if it loses some air over time, it will still have enough pressure to be safe and effective when needed. This is especially important because the spare wheel is not used regularly and may lose pressure while stored.

- **Safety and maintenance:** Keeping the spare wheel at a higher pressure ensures that it is ready for immediate use in case of an emergency, without the need to inflate it before changing it.

For these reasons, it is recommended that the spare wheel has the **highest inflation pressure** specified by the manufacturer, thus ensuring its effectiveness and safety in any situation.