The number of miles you'll get per 1mm of tread depth can be impacted by several factors, such as tyre size, type, driving conditions, and your driving style. On average, a tyre with a tread depth of 5.5mm can last up to 20,000 miles. That's an estimate of around 3,600 miles per 1mm of tread depth! Please keep in mind that this is an approximation, and your tyre's lifespan may vary. Most tyre manufacturers recommend replacing your tyres every 20,000 to 40,000 miles, or when your tread depth falls below 2mm. And remember, the UK's legal limit is 1.6mm across 75% of the circumference of the tyre. So, keep an eye on those treads and stay safe on the road!