MCCORMICK MTX Series - Tyre Pressures, Load Capacities and Service

Tyres, Wheels, Ballasting
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TYRE PRESSURES, LOAD CAPACITIES AND SERVICE
Tyres can be marked in two ways, as shown in the examples below:
CROSSPLY - Example
DI96J476
12.4-24 8PR
12.4 = Nominal tyre width in inches
- = Crossply structure
24 = Internal diameter
8PR = 8 ply rating
For correct tyre pressures/load capacities for CROSSPLY tyres see your dealer or tyre manufacturer.
RADIAL - Examples
DI96J475
18.4R38
MH04E015
710/75R34
The performance of a Radial tyre is determined by the Load Index and Speed Code which have replaced
the Ply rating found on Crossply tyres.
The maximum load which can be carried by a tyre is dependant upon the Load Index quoted on the tyre
wall. Charts 1 and 2, on the following page, give a guide to the maximum load a tyre can carry and a
percentage (%) variation depending upon the speed code or travel speed.
18.4 = Nominal tyre width in inches
R = Radial structure
38 = Internal diameter
142 = Load index number, 142 = 2650 kg (see chart 1)
A8 = Speed code for 40 km/h, (see chart 2)
710 = Nominal tyre width in mm
75 =
Nominal aspect ratio
(ratio of sidewall height/section width)
R = Radial structure
34 = Rim diameter at the bead seat in inches
168 = Load index number, 168 = 5600 kg (see chart 1)
A8 = Speed code for 40 km/h, (see chart 2)
165 = Load index number, 165 = 5150 kg (see chart 1)
B = Speed code for 50 km/h, (see chart 2)