How to Check Tyre Tread Depth with a Coin
Tyre tread depth is one of the most important indicators of tyre safety — and the good news is, you don’t need any fancy tools to measure it. In fact, all you need is a coin! In this post, we’ll show you a quick and easy way to check your tyre tread depth at home using everyday coins, so you can stay safe and avoid worn-out tyres before it’s too late.
Why Tread Depth Matters
Tread depth affects how your tyres grip the road, especially in wet or slippery conditions. As tyres wear down, their ability to channel water away and maintain traction decreases, increasing the risk of hydroplaning and skidding. The legal minimum tread depth in many countries is 1.6mm, but most safety experts recommend replacing tyres when the tread gets to 3mm for better performance and braking power.
The Coin Test
To check your tread, grab a coin — depending on your country, the method might differ slightly. Here are two common examples:
- Ghana (or countries without tread gauge coins): Use a standard coin with a rim or design edge you can measure against. Insert the coin into the tyre groove with the edge facing down. If most of the design disappears into the groove, your tread is still deep enough. If the entire design is visible, your tread is too low and it’s time to replace the tyre.
- UK: Use a 20p coin. Place it into the groove. If the outer band of the coin is visible, the tread is likely below 1.6mm.
- USA: Use a penny. Insert it into the groove with Lincoln’s head down. If you can see the top of his head, your tread is too shallow.
Repeat this test in several places around each tyre to check for uneven wear.
What If the Tread Is Too Low?
If your tyre tread is below the recommended depth or wearing unevenly, it’s time to replace it. Driving on bald or low-tread tyres puts you and others at risk, especially during rain or sudden braking situations. It’s not just a safety issue — in many areas, it’s also a legal requirement.
Conclusion
You don’t need to be a mechanic to check your tyre tread. A simple coin test takes less than a minute and could prevent a major accident. Make it part of your monthly routine or check before long road trips.
Not sure about the results?
Stop by Somekind Limited and we’ll inspect your tyres for free and recommend the best replacement options if needed.
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