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{ F & Q
{ Useful Info.
Tire Terminology:
| M+S, M/S or M & S | A tire sidewall designation indicating that the tire meets the RMA definition of a mud and snow tire. |
| McPherson Strut | A front suspension assembly that combines the functions of the shock absorber, the upper steering pivot, and the wheel spindle in a single unit. |
| Mag | A misleading description of specialty wheels; with exception of pure racing wheels, specialty wheels contain little or no magnesium. |
| Match Mounting | A mounting procedure that matches the high point of a tire with the low point of its wheel. A dot or mark on the tire is matched with a dot, a sticker, or the valve hole on the wheel. |
| Metric Tire Size System | A tire sizing system using the cross section in millimeters, aspect ratio, speed category, tire construction and the rim diameter in inches (e.g.: 185/70SR13). |
| Mounting Pad | The surface area of the back of the wheel's center that contacts the brake drum or hub flange of the vehicle. |
| N | |
| Negative Camber | A condition where the top of the tire is leaning inward from the tire's vertical centerline, as viewed from the top. |
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Negative Caster
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A setting where the steering axis is inclined forward at the top as viewed from the side; a condition which tends to cause instability. |
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Negative Offset
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When the back of the bolt pad is closer to the inside of the wheel; when the mounting face in inboard of the rim centerline; extends assembly away from vehicle resulting in wider tracking. |
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NHTSA
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National Highway Traffic Safety Administration. |
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Nomenclature
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Systematic naming of tire sizing systems. |
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Nominal
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Tire dimensions figured from the actual numbers in the size. |
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Numeric System
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A tire sizing system using tire cross section width and rim diameter in inches (e.g.: 7.35-14). |
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