Wider isn’t necessarily better: Upgrading your tires doesn’t necessarily mean up-sizing them.

VantageTire-sm

When you install wider tires without changing anything else, the size of the tire’s contact patch (i.e., the rubber touching asphalt) stays relatively constant. That size is based on a tire’s overall diameter, inflation pressure, and the weight acting on it. Installing fatter tires widens the patch, but it also shortens it front-to-back. Because of this, cornering gains can be offset by diminished straight-line traction, including braking and hydroplaning resistance. The increased mass and friction can also translate to slower lap times and a drop in fuel economy.

If you want to improve cornering grip, you’re better off switching to a higher-performance tire of the same size. Buy right, and you’ll get a stiffer sidewall for crisper turn-in and steering feel, as well as a stickier rubber compound and a tread pattern focused on dry grip.

Width won’t do it. Merely increasing the width of a tire doesn’t increase the area touching the pavement. It just makes it a wider, shorter patch.

A bigger donut. If other vehicular factors remain constant, increasing a tire’s overall circumference is the only way to enlarge the contact patch. Of course, your car’s body and suspension were designed around a specific tire circumference. Changing it might cause more problems than it solves.

Pressure and weight. Reducing air pressure or increasing the weight on a tire increases the size of the contact patch. But again, there are drawbacks. Some poor engineer has already fought this battle: 
Keep the stock size 
and just buy a more aggressive tire.

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