Size markings

The last part of the marking is the same: it is a radial tyre with a rim diameter of 25 inches. But the first part of the size marking is different. 
16.00 means the tyres is 16 inches wide. 
445/95 means the tyre is 445 millimetres wide and from the 95 series. The latter indicates that the ratio between height and width is 95%.

Within the OTR and industrial segments, most size markings still use inches. In contrast, tyres for mobile cranes (tyres for high speed) mainly feature size markings in millimetres.

Standard sizes versus wide sizes

Many different types of OTR tyres and tyre sizes are available because there are so many different OTR machines. That is why OTR tyres have been sorted into various series. The most popular of these are the 100, 80 and 65 series, whereby the number reflects the ratio between the height and width of the tyre.

100 series (standard)

The height/width ratio is approximately 1.

Example: 24.00R35
This ratio is not actually mentioned in the size marking.

80 series

The height/width ratio is approximately 0.8.

Examples: 23.5R25 or 525/80R25
This ratio is not mentioned in the first size marking, but has been mentioned in the second marking.

65 series

The height/width ratio is approximately 0.65.

Examples: 35/65R33 or 650/65R25
The ratio has been mentioned in the size marking.

Like to know more?

Do you need advice? Please contact us, our experts will be pleased to assist you. Contact our experts at +31 (0)523 - 850 850 or by e-mail to info@heuver.com. You can also read all about OTR on the OTR knowledge-page.