The short answer is maybe. It depends on the new tire diameter and/or wheel offset. If the new tire is close to your stock height and the wheel offset is close to factory specs you typically don’t need a lift.
However when changing to a taller tire and/or going with a more aggressive wheel stance then some sort of modification will be required. Modification options include leveling or lifting and/or sometimes trimming the fender. Although the overall tire diameter is important in determining what modification is required, the wheel offset must definitely be considered.
With regards to truck and Jeep applications, a general rule of thumb for matching the lift requirements to the proper offset is:
Stock height: Use a higher offset option (18mm +)
Leveled: Use zero to mid offset (0mm to 20mm) | 0mm is more aggressive with more "poke" than the higher offset.
Lifted: Use negative to zero offset. Negative offset options vary based on wheel width and the proper choice is determined by the vehicle height. Negative offset wheels require vehicle modification and fitment depends on the amount of lift. Wider wheels with lower offsets require more vehicle height. These are aggressive fitments with the most "poke".
Your local dealer is a great source for more information. To find a dealer near you, click here: Dealer Locator
It's important to note that changing the tire's overall diameter by +/- 2% will have negative impacts on the speedometer, gear ratios and ABS braking. It's always a good idea to have the onboard computer reprogrammed to match the new tire diameter.
Still have questions? Contact our Customer Support Team at 1-800-260-2522.