315/40R21 Tyres

The format 315/40R21 is one of the most popular across Britain. This dimension is fitted to a huge range of vehicles. By comparing 65 results, you can easily identify the tyre that best suits your needs.

In order to select the right tyres in 315/40R21, it helps to consider your usage: the type of journey (urban, motorway, mixed), the type of tyre you need (summer, winter, all-season) and the price, of course. The load and speed indices must comply with the requirements stated in your V5C registration document.

Purchasing tyres from an online retailer often enables you to save money compared with a local garage. The merchants listed on our comparison tool offer free delivery and some also arrange a mobile fitting service at your home or workplace.

Understanding the markings 315/40R21 can be done in seconds: the first number is the width in millimetres, followed by the sidewall height as a ratio, and R signals a radial tyre, with the final number being the rim size in inches. This information is printed on the sidewall of your current tyres.