How much tire clearance do these add?

The 50mm extension accommodates wider tire and wheel combinations without rubbing. Verify your wheel offset and sidewall height before installation to ensure proper clearance—use a jack and measure the gap between the tire and inner fender.

What wheel sizes and offsets work with these flares?

The 50mm width allows for more aggressive offsets than factory fenders. Cross-reference your wheel specs (width and offset) against your tire diameter using your vehicle's manual; the flares adapt to most common setups but final fitment depends on your specific combination.

Do these require drilling or modification to mount?

No drilling required. These bolt to factory mounting points on your vehicle. Preparation involves removing the OEM fenders and transferring or installing new hardware—refer to your vehicle's service manual for fastener torque specifications.