Yes, it is possible to use 185/70 R15 tires instead of 175/65 R15 tires on a Suzuki Ignis, but there are a few considerations to keep in mind.
Tire Size: The numbers in the tire size represent the width, aspect ratio, and rim diameter, respectively. The 175/65 R15 tires have a width of 175 millimeters, an aspect ratio of 65% (meaning the sidewall height is 65% of the tire's width), and are designed to fit a 15-inch rim. The 185/70 R15 tires have a width of 185 millimeters, an aspect ratio of 70%, and are also designed to fit a 15-inch rim. Therefore, the 185/70 R15 tires are wider and have a taller sidewall compared to the original 175/65 R15 tires.
Speedometer and Odometer Accuracy: When changing tire sizes, it can affect the accuracy of your speedometer and odometer readings. The larger circumference of the 185/70 R15 tires may cause the speedometer to display a slightly lower speed than the actual speed, and the odometer may not record the distance traveled as accurately. This discrepancy can vary depending on the specific tire size change.
Suspension and Handling: The larger and wider 185/70 R15 tires can potentially impact the suspension and handling characteristics of your vehicle. The increased width may lead to a slightly different contact patch with the road, altering the vehicle's response during cornering and braking. It's important to ensure that the new tire size does not cause rubbing against the wheel arches or any other clearance issues.
Before making any changes to your tire size, it is advisable to consult with a professional tire technician or a Suzuki dealership to determine if the new tire size is compatible with your Ignis model and if any adjustments or modifications are necessary to maintain optimal performance, safety, and legality.