If you have already decided to change the tire size, you should pay attention to the size issue. It is generally not recommended to change the rim size of an off-road vehicle, as the commonly used off-road rims are only 15in and 16in. Changing the size of the wheel doesn't make much sense. It is sufficient to increase the width and flatness of the tires. For instance, if 215/70R15 is changed to 235/70R15, only the width is altered. Change 265/70R16 to 265/75R16, only altering the flatness. Change 265/70R16 to 285/75R16. This change is quite significant. It is suggested to raise your body and do it again. Nowadays, off-road vehicles, especially luxury ones, are gradually becoming a trend, featuring large rims and thin tires ranging in size from 18N to 20n. However, tires with a power rating of over 17n are not easy to purchase in China and are very expensive. If it is really necessary to replace such large rims, one has to be prepared for more than double the cost. Some even cannot install tires and rims on the Chinese mainland.