Will these fit my vehicle's studs?

These are M12 x 1.5 metric threading. Verify your vehicle uses that size before ordering — most late-model cars and trucks do, but double-check your manual or existing lug nuts to be sure.

Do I need to prep or paint these before installation?

Aluminum spikes come ready to install as-is. If you want a different finish, light cleaning and anodizing or paint will work, but prep isn't required out of the box.

What torque spec should I use to tighten them?

Refer to your vehicle's service manual for the correct torque value — it varies by make and model. Over-tightening can strip the studs; under-tightening risks wheel separation. Get it right.