I have a 2004 Nissan Armada the stock tire size is 265/70/18 would it be a big deal to change to 275/70/18?
I don't know if that size will fit, but if it does, your speedometer will read slow, and engine RPM will be lower at any given speed than with stock tires. This will effectively give you slightly less power, but a higher top speed. All these differences will be very small, and if the tires don't rub, it won't really cause any problems.
The way the tyres are measured is a mixture of imperial and metric.The stock size is 265mm wide on an 18 inch rim. the 70 refers to the height of the sidewall of the tyre which in stock size is 70% of the width of the tyre i.e.185.5mm. The sidewall height of the 275/70/18 tyre is 192.5mm. If you work out the circumferance of each tyre, you will see that in theory, the defference is 44mm or about 1.5%. The best way to compensate for using a wider tyre is to use a lower profile tyre, i.e 285/65/18 tyre is only 0.25mm smaller than the stock tyre, but is 20mm (3/4 inch) wider.
