Tyre Guide

Tyre Size Fitment Guide

Use our guide to understand where your tyre width, tyre profile, construction type, rim diameter, load index, and speed rating is located on the tyre sidewall.

Radial Tyres

Radial is a specific design of tyre where the sidewall and tread functions as two independent features. The layers run radially across the tyre. Advantages of radial tyres include flexible sidewalls, reduced fuel consumption due to less rolling resistance and a softer ride due to layout of the tyre’s plies as well as the flex in the sidewalls.

Tubeless Tyres/Run Flat Tyres: Markings Explained

Tyre manufacturers use their own system for marking run flat tyres, resulting in different abbreviations appearing on the tyre’s sidewall, depending on the tyre brand.

Tubeless Tyres

Tubeless refers to ‘run flat’ tyres. Normally a car is supported by the air in the tyres where the tyre collapses when punctured. Run flat tyres have reinforced sidewalls which temporarily hold up the weight of your vehicle when getting a puncture. This allows the vehicle to drive on the flat tyre in order to get to a place of safety or your nearest fitment centre. The distance and max speed you are able to drive on a flat tubeless tyre depends on the tyre brand and tread pattern.

Tyre Load Index Chart

Use the table below to find the load and speed capacity from the markings on your tyres: 

IndexLoad(kg)
62265
63272
64280
65290
66300
67307
68315
69325
70335
71345
72355
73365
74375
75387
76400
77412
78425
79437
80450
81462
82475
83487
IndexLoad(kg)
84500
85515
86530
87545
88560
89580
90600
91615
92630
93650
94670
95690
96710
97730
98750
99775
100800
101825
102850
103875
104900
105925
IndexLoad(kg)
106950
107975
1081000
1091030
1101060
1111090
1121120
1131150
1141180
1151215
1161250
1171285
1181320
1191360
1201400
1211450
1221500
1231550
1241600
1251650
1261700
Speed RatingKM/H
F80
G90
J100
K110
L120
M130
N140
P150
Q160
R170
S180
T190
U200
H210
V240
W270
Y300
(Y)300+
IndexLoad(kg)
62265
63272
64280
65290
66300
67307
68315
69325
70335
71345
72355
73365
74375
75387
76400
77412
78425
79437
80450
81462
82475
83487
Speed RatingKM/H
F80
G90
J100
K110
L120
M130
N140
P150
Q160
R170
S180
T190
U200
H210
V240
W270
Y300
(Y)300+

The Anatomy Of The Tyre

To the casual observer all tyres look alike. Don’t be fooled. Today’s tyres offer a degree of handling, ride comfort, traction, tread wear and fuel economy that far exceeds tyres manufactured just a few years ago. Below are the components of a modern tyre:

Tread
The tread is the part of the tyre that comes in contact with the road surface. The tread is made of thick rubber or rubber/composite compound with a pattern of grooves, lugs, voids and sipes. Every tyre comes with a different tread pattern, unique to that tyre.

Rain grooves
These are needed to channel water away to help prevent aquaplaning.

Lugs
Lugs are the portion of the tread that make contact with the road.

Voids
Voids are spaces between lugs that allow the lugs to flex and flush out water.

Sipes
Sipes are valleys across the whole tyre. They run perpendicular to the grooves and allow water from the grooves to escape to help prevent aquaplaning.

Wear bar
Also known as wear indicators; these raised features at the bottom of tread grooves indicate that a tyre has reached its wear limit. When the tread lugs are worn away enough that the wear bars connect it’s time to replace the tyre.

Bead
The bead connects the rim of the wheel to the tyre. It’s normally strengthened with steel wire. It’s fitted very tightly so the tyre doesn’t shift.

Sidewall
The sidewall is the part of the tyre between the bead and the tread. It is composed of rubber for the most part and strengthened with fabric or steel cords.

Shoulder
The shoulder is the edge of the tread as it begins to transition into the sidewall.

Ply
Plies are cords wrapped in rubber. These prevent the rubber from stretching. The way that plies are laid out in the tyre makes a big difference to its performance.