A tire with the wrong inside diameter may not properly fit the rim, while a tire with an incorrect outside diameter may affect the accuracy of the vehicle's speedometer and odometer. Additionally, because the traction control, torque and gearing settings depend on the distance the wheel travels in one revolution, a tire with the wrong outside diameter may also affect the proper function of these critical systems.Continue Reading
However, these pitfalls can be avoided by maintaining the overall size of the wheel when purchasing rims and tires. For instance, if the new rims are larger than the original ones by 2 inches, the height of the new tires must be 2 inches shorter. Keep in mind, though, that the height of a tire is not directly specified and must be calculated from its aspect ratio, or the proportion of its height to its width.
By carrying out these calculations, and buying the correct combination of rims and tires, a driver can even enhance the way a vehicle looks and drives. In fact, upsizing, or using a larger rim, can improve the car's braking performance, cornering grip and steering feel. And downsizing, or using a smaller rim, is useful when buying snow tires, as they tend to be less expensive and more effective on snow and ice in narrower sizes.Learn more about Tires, Rims & Wheels
The right tire size for a Pontiac G6 depends on the year of the car and the rim size. For instance, a 2008 Pontiac G6 with 16-inch rims has a tire size of P215/60R16 94S.Full Answer >
The standard tire size for a 15 x 7 rim is 205/65R-15. However, wider tires with larger tires can fit, according to the amount of space available on the chassis of the vehicle.Full Answer >
A tire size chart is used to translate the letters and numbers found on a tire's sidewall and contains information about tire class, width, aspect ratio, construction and wheel diameter. If you aren't familiar with reading the tire codes, it's easiest to write down the numbers and then compare them.Full Answer >
The size of the tire does affect the driveability of the car.. Tires with thinner sidewalls do not absorb the vibrations of the road well and instead transfer them directly to the cabin of the vehicle.Full Answer >