TD2303-08EN
YTxx2
54
6.10.1 Tyre pressure and wheel load
Every tyre displays information concerning its permissible load (load index) and speed
(speed rating). The load index (e.g.
152/147
) is a code for the maximum permissible load at
the speed indicated by the speed rating (e.g. letter
K
). The first number in the load index
indicates the index for single mounting, the second for dual mounting.
The tyre pressure should normally be 8 - 10 bar at nominal carrying capacity, depending on
the tyre specification and load condition. The pressure for the tyre's load index is shown on
the tyre sidewall.
Speed rating (on tyre sidewall): F= 80km/h, G=90 km/h, J=100 km/h, K=110 km/h,
L=120 km/h, M=130 km/h).
CAUTION
According to the ETRTO Standards Manual:
“In any case, it is recommends to avoid the
maximum permissible load capacity if the resulting inflation pressure is higher than 1000
kPa (10 bar). In that case, either the load shall be reduced accordingly or the tyre and rim
manufacturers shall be consulted.
”
NOTICE
According to the ETRTO Standards Manual: "The load carrying capacity of tyres in dual
fitments is twice the load carrying capacity in single up to 40 km/h. Bonus loads will not be
permitted for speeds of 40 km/h and above if the wheel axles are rigidly fixed to the body of
the vehicle."
The relationship between load index and the maximum permissible tyre load is shown in the
table below.
Load index and load per tyre in kg
(The tyre pressure for the load index is shown on the tyre sidewall)
Load index
Load kg
Load index
Load kg
Load index
Load kg
140
2500
160
4500
180
8000
141
2575
161
4625
181
8250
142
2650
162
4750
182
8500
143
2725
163
4875
183
8750
144
2800
164
5000
184
9000
145
2900
165
5150
185
9250
146
3000
166
5300
186
9500
147
3075
167
5450
187
9750
148
3150
168
5600
188
10000
149
3250
169
5800
189
10300
150
3350
170
6000
190
10600
151
3450
171
6150
191
10900
152
3550
172
6300
192
11200
153
3650
173
6500
193
11500
154
3750
174
6700
194
11800
155
3875
175
6900
195
12150
156
4000
176
7100
196
12500
157
4125
177
7300
197
12850
158
4250
178
7500
198
13200
159
4375
179
7750
199
13600
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