The main difference between these two tire sizes is the aspect ratio. The aspect ratio is the ratio of the tire's height to its width. A higher aspect ratio indicates a taller tire, while a lower aspect ratio indicates a wider tire.
In this case, the P215/70R15 tires have a taller sidewall than the P215/65R16 tires. This means that the P215/70R15 tires will raise the vehicle's ride height by about 1 inch.
There are a few potential problems with installing taller tires on a vehicle. First, the taller tires may rub against the wheel wells or fenders, especially when turning or going over bumps. Second, the taller tires may affect the vehicle's handling and braking. Third, the taller tires may throw off the vehicle's speedometer and odometer.
For these reasons, it is not recommended to install taller tires on a vehicle unless the vehicle is specifically designed for them.
