What wheel and tire sizes work with these flares?

These flares are engineered for wide body kits, which typically accommodate larger offsets and wider tire widths than stock. Reference your wide body kit's wheel offset specifications and your tire sidewall diameter to confirm clearance. Your wheel and tire combo should match the kit manufacturer's recommendations.

Do these require drilling or do they bolt to factory mounting points?

These flares are designed to integrate with the complete wide body kit you're installing. Mounting method depends on the specific kit configuration — some use existing body holes, others may require new fastener points. Consult your wide body kit's installation guide for drilling requirements and mounting locations.

How much tire clearance do these add compared to stock fenders?

Wide body flares provide significant additional clearance over factory fenders, allowing for wider tire and wheel packages. The exact gain depends on your flare's final position relative to your suspension setup and tire sidewall height. Test fit with your chosen wheels and tires before final fastening to ensure proper clearance.