SPEED RATING

Marking	Charactistics
Speed Symbol "N"	For vehicles with a speed capability not exceeding 140 Km/h (88 Mph)
Speed Symbol "P"	For vehicles with a speed capability not exceeding 150 Km/h (94 Mph)
Speed Symbol "Q"	For vehicles with a speed capability not exceeding 160 Km/h (100 Mph)
Speed Symbol "R"	For vehicles with a speed capability not exceeding 170 Km/h (106 Mph)
Speed Symbol "S"	For vehicles with a speed capability not exceeding 180 Km/h (113 Mph)
Speed Symbol "T"	For vehicles with a speed capability not exceeding 190 Km/h (119 Mph)
Speed Symbol "U"	For vehicles with a speed capability not exceeding 200 Km/h (125 Mph)
Speed Symbol "H"	For vehicles with a speed capability not exceeding 210 Km/h (130 Mph)
Speed Symbol "V"	For vehicles with a speed capability not exceeding 240 Km/h (e.g. 225/55 R 15 91V)
Speed Symbol "W"	For vehicles having speed capability not exceeding 270 Km/h (e.g. 225/60 R 15 96W)
Speed Symbol "Y"	For vehicles having speed capability not exceeding 300 Km/h (e.g. 275/40 R 18 94Y)
Speed Category "VR"	For vehicles having speed capability over 210 Km/h (e.g. 195/50 VR 15)
Speed Category "ZR"	For vehicles with a speed capability over 240 Km/h (e.g. 205/40 ZR 17)
ZR+ Speed Symbol "W"	Tyres marked with both designations for vehicles with speed capability over 240 Km/h but not exceeding 270 Km/h
ZR+ Speed Symbol "Y"	Tyres marked with both designations for vehicles with speed capability over 240 Km/h but not exceeding 300 Km/h

TYRE LOAD RATINGS

Load Index	Kgs	Load Index	Kgs	Load Index	Kgs	Load Index	Kgs
Most car and van tyres used in the UK have both a load and speed rating after the tyre size, e.g. 195/65R15 is usually followed by 91V. This means the tyres can carry a load of 615 kgs upto a maximum speed of 149 mph. When replacing tyres it is important to ensure the new tyres, even if a different size, have the same or a higher load rating. It is normal for the combined load of the 4 tyres to exceed the maximum weight of the vehicle by about 25% to allow for uneven load distribution or excessive loads when cornering or braking. The table below shows the conversion from the LI number to the capacity in kilograms.
0	45	30	106	60	250	90	600
1	46.2	31	109	61	257	91	615
2	47.5	32	112	62	165	92	630
3	48.7	33	115	63	272	93	650
4	50	34	118	64	280	94	670
5	51.5	35	121	65	290	95	690
6	53	36	125	66	300	96	710
7	54.5	37	128	67	307	97	730
8	56	38	132	68	315	98	750
9	58	39	136	69	325	99	775
10	60	40	140	70	335	100	800
11	61.5	41	145	71	345	101	825
12	63	42	150	72	355	102	850
13	65	43	155	73	365	103	875
14	67	44	160	74	375	104	900
15	69	45	165	75	387	105	925
16	71	46	170	76	400	106	950
17	73	47	175	77	412	107	975
18	75	48	180	78	425	108	1000
19	77.5	49	185	79	437	109	1030
20	80	50	190	80	450	110	1060
21	82.5	51	195	81	462	111	1090
22	85	52	200	82	475	112	1120
23	87.5	53	205	83	487	113	1150
24	90	54	212	84	500	114	1180
25	92.5	55	218	85	515	115	1215
26	95	56	224	86	530	116	1250
27	97.5	57	230	87	545	117	1285
28	100	58	236	88	560	118	1320
29	103	59	243	89	580	119	1360
Load Index	Kgs	Load Index	Kgs	Load Index	Kgs	Load Index	Kgs