RV FEATURE
The last four digits indicate the week and year the tyre was manufactured , e . g ., week 24 in 2023 .
TYRE SIZE |
SERVICE
DESCRIPTION
|
Construction type |
Section width |
Aspect ratio |
Casing construction |
Rim diameter |
Load index |
Speed rating |
AT LT |
235 |
75 |
R |
15 |
104 |
R |
CONSTRUCTION TYPE
Manufacturers will use abbreviations to describe the characteristics of a tyre and its construction , e . g . H / T ( highway terrain ) or A / T ( all terrain ). There will often be other letters such as LT ( Light Truck construction ) or XL ( this can indicate that the tyre has extra load carrying characteristics ). Refer to tyre manufacture charts for further details .
SECTION WIDTH
The tyre is measured in millimetres from the widest points of the tyre , sidewall to sidewall .
ASPECT RATIO
This is the dimensional relationship of the section height compared to the section width expressed as a percentage . Basically , it ’ s the height of the tyre sidewall expressed as Overall Diameter / Rim Diameter x 100 .
CASING CONSTRUCTION
The R in this case designates the tyre is of a radial casing construction .
RIM DIAMETER
This is the size of the rim diameter measured in inches .
LOAD INDEX
The load index is a number indicating the tyre ’ s maximum load capacity .
SPEED RATING
Denotes the maximum speed for which the tyre is rated .
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