Pros:
* Improved Ground Clearance: This is the primary benefit. You'll be able to tackle more challenging terrain and avoid scraping the undercarriage on obstacles.
* Better Approach/Departure Angles: The lift and larger tires improve the angles at which you can approach and leave obstacles, enhancing off-road capability.
* Improved Appearance: Many find the combination aesthetically pleasing, giving the YJ a more rugged and capable look.
* Relatively Simple Installation: A 2.5" lift is often a relatively straightforward installation, especially if you choose a budget-friendly lift kit.
* Good Tire Selection: 31" tires offer a good balance of off-road capability and on-road drivability. They're widely available and relatively affordable.
Cons:
* Possible Rubbing: Depending on the lift kit and wheel offset, you might experience tire rubbing on the fenders, especially at full articulation (steering wheel turned sharply while flexing the suspension). This might require trimming or fender flares.
* Slight Increase in Speedometer Inaccuracy: Larger tires will make your speedometer slightly less accurate, showing a lower speed than your actual speed. This is easily correctable with a speedometer calibrator or a re-gearing of the differential (though the latter is more involved and expensive).
* Increased Wear and Tear: Larger tires and a lifted suspension can put more stress on your drivetrain components, leading to potentially increased wear and tear. Regular maintenance is crucial.
* Slight Decrease in Fuel Economy: Larger tires usually translate to slightly lower fuel economy.
* Potential Gear Ratio Issues: While not always necessary, you might experience a noticeable loss of low-end torque. Re-gearing your differential is a solution for this, but it adds complexity and cost.
Overall:
For a 1995 YJ, a 2.5" lift with 31" tires is a very reasonable upgrade. It offers a noticeable improvement in off-road capability and appearance without being excessively extreme. However, always carefully consider the potential for rubbing and the possibility of needing additional modifications like fender trimming or a speedometer recalibration. Research specific lift kits and tire options to minimize potential problems. And remember, proper installation is key to avoiding issues.
