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SEEP RATING | |
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Today, the only tires that continue to include the speed rating "in" the tire size (P225/50ZR16) are Z-speed rated tires. In this case, following the two digits used to identify the aspect ratio are the letters ZR to identify the tire's speed rating (Z) and its internal construction (R). Since 1991, all other speed ratings are identified in the tire's Service Description (which will be covered shortly).
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| Speed Symbol | | Speed Limit (km/h) | |
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| J | | 100 | |
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| K | | 110 | |
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| L | | 120 | |
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| M | | 130 | |
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| N | | 140 | |
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| P | | 150 | |
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| Q | | 160 | |
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| R | | 170 | |
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| S | | 180 | |
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| T | | 190 | |
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| U | | 200 | |
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| H | | 210 | |
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| V | | 240 | |
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| W | | 260 | |
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| Y | | 300 | |
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| Z | | 300+ | |
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