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How to read the numbers on your tire


	How to read the numbers on a tire

Code definitions of the tire sidewall

1 -	The peaked mountain with snowflake symbol indicates a snow tire.
2 -	M+S (Mud and Snow) indicates an all-season tire.
3 -	P stands for passenger vehicle (or you may find L for Light-duty vehicle).
4 -	195 is the width of the tire in millimetres.
5 -	60 is the “aspect ratio” - the ratio of the height of the sidewall to the width, expressed as a percentage.
6 -	R means the tire has radial construction.
7 -	15 represents the wheel diameter in inches.
8 -	87 is the load index.
9 -	Q is the speed rating.

	The maple leaf symbol is the national tire safety mark of Canada. It means the manufacturer certifies that the tire meets Transport Canada requirements.
The identification number is the reference number used by the manufacturer to identify specific tires.
	The four digit code identifies the date of fabrication.

Source: Industry Canada

Below is a list of speed ratings along with the corresponding speeds they represent. Remember, the speeds are test speeds, not recommended speeds. Speeds are in US imperial format:

Q- Up to 100mph
R- Up to 106mph
S- Up to 112mph
T- Up to 118mph

U- Up to 124mph
H- Up to 130mph
V- Up to 149mph

W- Up to 168mph
Y- Up to 186mph
Z- 149mph and over

The load index refers to the load-carrying capacity of a tire, or how much weight a tire can support. For example, if a tire has a load index of 89, it can support 1,279 pounds (from below chart) at maximum air pressure. Multiply that by four (4 x 1,279 = 5,116 pounds) to get your maximum load-carrying capacity. It is not recommended to install tires with a lower load index than what came on your car from the factory:

Load Index	Load (lbs)	Load Index	Load (lbs)	Load Index	Load (lbs)
0	99	50	419	100	1764
1	102	51	430	101	1819
2	105	52	441	102	1874
3	107	53	454	103	1929
4	110	54	467	104	1984
5	114	55	481	105	2039
6	117	56	494	106	2094
7	120	57	507	107	2149
8	123	58	520	108	2205
9	128	59	536	109	2271
10	132	60	551	110	2337
11	136	61	567	111	2403
12	139	62	584	112	2469
13	143	63	600	113	2535
14	148	64	617	114	2601
15	152	65	639	115	2679
16	157	66	639	116	2756
17	161	67	677	117	2833
18	165	68	694	118	2910
19	171	69	716	119	2998
20	176	70	739	120	3086
21	182	71	761	121	3197
22	187	72	783	122	3307
23	193	73	805	123	3417
24	198	74	827	124	3527
25	204	75	852	125	3638
26	209	76	882	126	3748
27	215	77	908	127	3858
28	220	78	937	128	3968
29	227	79	963	129	4079
30	234	80	992	130	4189
31	240	81	1019	131	4289
32	247	82	1047	132	4409
33	254	83	1074	133	4541
34	260	84	1102	134	4674
35	267	85	1135	135	4806
36	276	86	1168	136	4938
37	282	87	1201	137	5071
38	291	88	1235	138	5203
39	300	89	1279	139	5357
40	309	90	1323	140	5512
41	320	91	1356	141	5677
42	331	92	1389	142	5842
43	342	93	1433	143	6008
44	353	94	1477	144	6173
45	364	95	1521	145	6393
46	375	96	1565	146	6614
47	386	97	1609	147	6779
48	397	98	1653	148	6844
49	408	99	1709	149	7165
				150	7385

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