A popular category, 235/40 R18 tyre are commonly used on premium mid-size and larger cars. The number 235, the first in this description, represents cross-section width - an important indication for choosing the right size for your vehicle. It simply means that, from sidewall to sidewall, this tyre is about 235 millimetres wide.
The second number gives us the aspect ratio. This is the ratio between cross-section width and height - an aspect ratio of 40 means that the sidewall height is 40% of cross-section width. Next, we are informed that this is a radial tyre, thanks to the R' marking. This is by far the most common constructive type.
The final number (18) is also very important. This indicates the inner diameter, and it tells us that 18 inch rims are needed for this tyre. Choose now from mytyres.co.uk the right tyre size for your vehicle using our intelligent, easy to use search function!
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