Will these fit my vehicle with a 20mm wheel spacer?

The 60mm shank provides adequate length for most common spacer setups, but you'll want to measure your stud exposure after installation to confirm the nut seats fully on the stud. Thread should never be visible above the nut.

Can I use these with my existing wheels, or do I need new ones?

These are a direct replacement for your factory lug nuts as long as your wheels have M12 x 1.5 lug holes. No wheel changes required — just swap them out at installation.

What torque spec should I use when tightening?

Refer to your vehicle's service manual for the correct torque specification. It varies by manufacturer and suspension setup. Over-torquing aluminum nuts can cause stripping, so stick to factory specs.