In tire lingo, aspect ratio is the proportion of size between tire width and sidewall height. When you look at the string of numbers stamped into the side of your tire, the aspect ratio is the 2nd number, following the tire's width.
Burning of the air/fuel mixture in the combustion chamber that generates the energy necessary to run your engine. The mini-explosion in a combustion engine is triggered by a spark from the spark plugs that's added to the compressed air/fuel mixture at the top of the piston cycle. Timing and a proper air/fuel ratio are critical to the power gained during combustion.
Essentially, detonation is uncontrolled combustion. In other words, if your cylinder fires when it should not be firing, you have a detonation problem. During engine combustion, air and fuel mix together and are ignited by the spark plug, producing the driving energy behind your vehicle. This ignition should only happen once every cycle. However, if there is too much heat or pressure in your cylinders, or if your air/fuel ratio is too rich, your engine may experience detonation, or multiple ignitions during a single cycle.
A DTC is a 5 digit alphanumeric code that your onboard diagnostic computer generates when it sense a problem. In order to view these codes, you need to plug either a mechanic's code reader or a power programmer into your OBD-II port, which can be found right below your dashboard.
A straight line segment that passes through the center of a circle or sphere and connects two opposite points. Mathematically, the diameter of a circle is expressed as 2r, with "r" representing the radius of the circle or sphere.
A tire's load index indicates its maximum load-carrying capacity when fully inflated. All tires are rated on a scale that ranges from 0 (99lbs. per tire) all the way to 150 (7385 lbs. per tire). If a vehicle has four tires that all have a load index of 99, then each tire can safely bear 1709lbs. of weight, and all four tires together can support 6836lbs. of weight. The load index is always embossed into the side of your tires, and it's the last number before the speed rating letter.