Frequently Asked Questions
This tire size has a width of 315 millimeters, a height of 70% of the width, and fits a 17-inch diameter rim. Use our online fitment tool today and find the best tire size for your vehicle.
No, 315/70R17 denotes the dimensions of the 17-inch wheels, however, the actual diameter of the tire is 33.6 inches. A 35-inch tire would have another measurement designation and a slightly different actual size.
This is the tire size information. 315 is the tread width, meaning the tire is around 315 millimeters wide. 70 is the aspect ratio, or the height of the sidewall. R is the radial construction, and 17 is the rim diameter, indicating that a rim is 17 inches in diameter.
When mounted on a 17-inch rim, this tire has an approximate diameter of 33.6 inches, or 854 millimeters. This overall diameter is calculated by combining the tire’s tread width, aspect ratio, and rim size to determine the tire’s total measurement from the ground to the top.
Most vehicle manufacturers recommend using a +15 to +40 millimeter offset wheel to achieve the best fitment and performance. The offset is measured as the distance between the wheel’s mounting surface and its centerline. Choosing the right offset ensures optimal clearance and alignment.
