MORE ON TIRES

Speed Symbol
Load Index
Load Range

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SPEED SYMBOL top

This is the maximum speed the tire can handle while lifting its designated load index. Note that if an accident occurs because the vehicle is going above the tire's maximum allowable speed, the insurance of the car is rendered useless. Additionally, The driver would also face legal action. This chart is helpful when the car owner decides to switch tires.

TIRE SPEED SYMBOL
Code	mph	km/h		Code	mph
A1	3	5		L	75
A2	6	10		M	81
A3	9	15		N	87
A4	12	20		P	94
A5	16	25		Q	100
A6	19	30		R	106
A7	22	35		S	112
A8	25	40		T	118
B	31	50		U	124
C	37	60		H	130
D	40	65		V	149
E	43	70		Z	over 149
F	50	80		W	168
G	56	90		(W)	over 168
J	62	100		Y	186
K	68	110		(Y)	over 186
Tire Speed Symbol by Tire and Rim Association Standard

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LOAD INDEX top

This is the maximum load a single tire could carry. However, this only applies to a certain air PSI within the tire which is specified in the Tire and Rims association's manual.  Note that if an accident occurs because the vehicle is going above the tire's maximum allowable load, the insurance of the car is rendered useless. Additionally, The driver would also face legal action.  This chart is helpful when the car owner decides to switch tires.

TIRE LOAD INDEX
INDEX	KGs	LBs	INDEX	KGs	LBs	INDEX	KGs	LBs	INDEX	KGs	LBs
51	195	430	81	462	1019	111	1090	2403	141	2575	5677
52	200	441	82	475	1047	112	1120	2469	142	2650	5842
53	206	454	83	487	1074	113	1150	2535	143	5725	12621
54	212	467	84	500	1102	114	1180	2601	144	2800	6173
55	218	481	85	515	1135	115	1215	2679	145	2900	6393
56	224	494	86	530	1168	116	1250	2756	146	3000	6614
57	230	507	87	545	1202	117	1285	2833	147	3075	6779
58	236	520	88	560	1235	118	1320	2910	148	3150	6945
59	243	536	89	580	1279	119	1360	2998	149	3250	7165
60	250	551	90	600	1323	120	1400	3086	150	3350	7385
61	257	567	91	615	1356	121	1450	3197	151	3450	7606
62	265	584	92	630	1389	122	1500	3307	152	3550	7826
63	272	600	93	650	1433	123	1550	3417	153	3650	8047
64	280	617	94	670	1477	124	1600	3527	154	3750	8267
65	290	639	95	690	1521	125	1650	3638	155	3875	8543
66	300	661	96	710	1565	126	1700	3748	156	4000	8818
67	307	677	97	730	1609	127	1750	3858	157	4125	9094
68	315	694	98	750	1653	128	1800	3968	158	4250	9370
69	325	717	99	775	1709	129	1850	4079	159	4375	9645
70	335	739	100	800	1764	130	1900	4189	160	4500	9921
71	345	761	101	825	1819	131	1950	4299	161	4625	10196
72	355	783	102	850	1874	132	200	441	162	4750	10472
73	365	805	103	875	1929	133	2060	4542	163	4875	10748
74	375	827	104	900	1984	134	2120	4674	164	5000	11023
75	387	853	105	925	2039	135	2180	4806	165	5150	11354
76	400	882	106	950	2094	136	2240	4938	166	5300	11684
77	412	908	107	975	2150	137	2300	5071	167	5450	12015
78	425	937	108	1000	2205	138	2360	5203	168	5600	12346
79	437	963	109	1030	2271	139	2430	5357	169	5800	12787
80	450	992	110	1060	2337	140	2500	5512	173	6000	13228
Tire Load Indexl by Tire and Rim Association Standard

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LOAD RANGE top

Some tires would have only 2 plies, but the ply rating could be 6, which creates a need for a standardized ply chart. This chart can measure the load regardless of the ply quantity and quality.  This chart is helpful when the car owner decides to switch tires.

Load Range by Tire and Rim Association Standard.

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