How do I know if M12 x 1.5 is the right thread for my wheels?

Check your wheel's center bore packaging or contact the wheel manufacturer. M12 x 1.5 is common on many import and domestic platforms, but thread pitch and diameter vary. Installing the wrong lug nut can cause wheel runout or slip during driving.

Can I mix the 60mm and 90mm spikes on the same wheel set?

Yes—many builders alternate heights for a staggered spike look, or use all of one height for uniformity. The choice is yours depending on your aesthetic. Both heights use the same thread spec.

Do these come with a torque spec or installation guide?

These are lug nuts only. Refer to your vehicle's service manual for proper torque values. Over-tightening aluminum lug nuts can strip threads, so hit the spec and use a calibrated torque wrench.