FAQ | How can I tell what size a tyre is?

Tyres sizes can be found on the tyre label and are defined by a number of variables; an example of which could be: 385/65 R22.5 160K <ul> <li>385: Width of the tyre in millimeters.</li> <li>65: Aspect ratio, meaning the sidewall height is 65% of the tyre's width.</li> <li data-sourcepos="8:5-8:53">R: Tyre construction (Radial in this case).</li> <li data-sourcepos="9:5-9:58">22.5: Diameter of the rim the tyre fits in inches.</li> <li data-sourcepos="10:5-10:106">160: Load index, indicating the maximum weight the tyre can carry (see load index charts online).</li> <li data-sourcepos="11:5-12:0">K: Speed rating, indicating the maximum sustained speed the tyre can handle (see speed rating charts online).</li> </ul>

How can I tell what size a tyre is and what are the other markings?

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Tyres sizes can be found on the tyre label and are defined by a number of variables; an example of which could be:

385/65 R22.5 160K

385: Width of the tyre in millimeters.
65: Aspect ratio, meaning the sidewall height is 65% of the tyre's width.
R: Tyre construction (Radial in this case).
22.5: Diameter of the rim the tyre fits in inches.
160: Load index, indicating the maximum weight the tyre can carry (see load index charts online).
K: Speed rating, indicating the maximum sustained speed the tyre can handle (see speed rating charts online).

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