Plus sizing is one of the easiest ways to achieve enhanced performance and improve the appearance of your vehicle. In the example below, a 15x7 wheel with a 205/65R-15 tire is considered the O.E. (original equipment) size. Converting to a plus one size would mean increasing the wheel diameter by one inch (16x7.5) and selecting an appropriate tire to fit (225/55R-16). Likewise, moving to a plus two fitment would result in a 17x8 wheel and a 245/45R-17 tire. It is important to note that although the wheel diameter is increasing, the overall diameter of the tire remains consistent.
Two things happen to the tire to increase performance when moving into plus sizes. First, the tire becomes wider due to an increase in section width. This provides a larger footprint and more contact with the driving surface. Second, the aspect ratio is lower, resulting in a shorter sidewall. The combination of these changes offers better lateral stability and increased steering response.
The offset of a wheel is what locates the tire and wheel assembly in relation to the suspension. More specifically, it is the measured distance between the hub mounting surface and the center line of the rim. Below is an explanation of the various types of offsets which are pictured in the above graphic.
Positive Offset
A positive offset occurs when the hub mounting surface is on the street side (the side you see) of the center line of the rim. Most factory rims will have this type of offset.
Zero Offset
When the hub mounting surface is centered within the rim, it is known as a zero offset.
Negative Offset
If the hub mounting surface is on the brake side of the center line of the rim, it is considered a negative offset or "deep dish".
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Originally Posted by DISCOUNTTIRE.com
Plus sizing is one of the easiest ways to achieve enhanced performance and improve the appearance of your vehicle. In the example below, a 15x7 wheel with a 205/65R-15 tire is considered the O.E. (original equipment) size. Converting to a plus one size would mean increasing the wheel diameter by one inch (16x7.5) and selecting an appropriate tire to fit (225/55R-16). Likewise, moving to a plus two fitment would result in a 17x8 wheel and a 245/45R-17 tire. It is important to note that although the wheel diameter is increasing, the overall diameter of the tire remains consistent.
2001 Mitsubishi Galant DE
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