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How much fuel the tyre uses as it rolls. Graded A to E, where A is the most efficient and E the least.
How well the tyre stops in the wet. Graded A to E, where A is the shortest stopping distance. Each grade is worth roughly 3 metres, about a car length.
How loud the tyre is from outside the car, measured in decibels. Graded A to C, where A is the quietest.
Designed for cars, rather than vans, 4x4s or commercial vehicles.
A stronger sidewall lets this tyre carry more weight than a standard tyre of the same size. Marked XL on the sidewall.
315/30 R21 is a rear tyre size for high-performance sports cars and grand tourers. To break it down, the first number is the tyre width, which is 315 millimetres. The second number is the aspect ratio and is commonly known as the sidewall. In this case, the sidewall is 94 millimetres (30% of 315mm). R21 means it's a radial tyre with a 21-inch diameter rim. The overall diameter of the tyre is 722 millimetres. Due to the low sidewall, the tyre will have a stiffer sidewall and will absorb bumps less. We have the 315/30 R21 tyre in stock, including the XL versions, at Tyres.co.uk.
We take care of everything for you with our fully fitted prices:
You pay online for the tyres and the fitting, so when you come for your appointment, there are no extra charges for the tyre fitting.
The price shown for mail-order tyres covers the tyre only (including VAT). Once you’ve selected your tyres and proceed to the basket, a delivery fee will be added to your order. Please be aware that certain areas of the country may incur additional delivery charges and, in some cases, slightly longer delivery times.
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