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Understanding Tyre Pressure: Crossroads Mechanical's Guide to Safe and Efficient Driving

A mechanic uses a tyre gauge to check tyre pressure

Tyre pressure is a critical aspect of vehicle maintenance that often goes unnoticed by many drivers. At Crossroads Mechanical, we've seen firsthand how maintaining the correct tyre pressure can drastically improve your driving experience. Here, we'll walk you through what tyre pressure is, why it's vital for your car, how to detect if your tyre pressure is low, and steps to adjust it to the right level.


What is Tyre Pressure?

Tyre pressure refers to the amount of air in the tyres of your vehicle, measured in pounds per square inch (PSI) or kilopascals (kPa). This measurement influences how your tyres make contact with the road. Adhering to the recommended tyre pressure specific to your vehicle's make and model is crucial. This information is typically found in the owner's manual or on a sticker inside the driver’s side door.


Why is Tyre Pressure Important?

  1. Safety: Proper tyre pressure ensures better handling and braking performance. Under-inflated or over-inflated tyres can lead to unpredictable vehicle behaviour, especially in emergency situations, making it harder to control the car.

  2. Efficiency: Tyres with correct pressure levels offer optimal contact with the road, reducing rolling resistance and thus improving fuel efficiency. This means you’ll get more kilometres out of each litre of fuel, a significant saving in the long run.

  3. Tyre Longevity: Incorrect tyre pressure is a common cause of premature tyre wear. Over-inflation can lead to excessive wear in the centre of the tyre, while under-inflation causes wear on the edges. Maintaining the right pressure can extend the life of your tyres significantly.

Detecting Low Tyre Pressure

Recognising the signs of low tyre pressure is key to preventing the aforementioned issues. Here are some indicators that your tyre pressure may be too low:

  • Visual Check: If your tyres look flat or squished, it’s a clear sign that they might be under-inflated.

  • Handling Issues: If the car feels sluggish or it’s harder to steer than usual, it could be due to low tyre pressure.

  • Tyre Pressure Warning Light: Many modern vehicles have a tyre pressure monitoring system (TPMS) that alerts you when your tyre pressure drops below a certain threshold.

How to Correct Your Tyre Pressure

Adjusting your tyre pressure is a simple process that can be done at home or at a petrol station equipped with an air pump:

  1. Check the Recommended Pressure: Look up the recommended tyre pressure for your vehicle in the owner’s manual or on the door sticker.

  2. Use a Tyre Pressure Gauge: You can purchase a tyre pressure gauge or use one available at most service stations. Remove the cap from the tyre's valve stem, attach the gauge, and read the pressure.

  3. Inflate or Deflate Your Tyres: If the reading is below the recommendation, inflate the tyre to the correct level using an air pump. If the tyre is over-inflated, release some air until you reach the desired pressure.

  4. Recheck the Pressure: After adjusting, check the tyre pressure again to ensure it’s within the recommended range. Don’t forget to replace the valve caps.

  5. Regular Checks: Make it a habit to check your tyre pressure monthly and before long trips or carrying extra load.

Maintaining the correct tyre pressure is not just about enhancing the performance of your vehicle or extending the lifespan of your tyres—it’s also a fundamental part of safe driving. Regular checks and adjustments will help you stay safe on the road, improve your vehicle’s efficiency, and save money on fuel and tyre replacements.

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