Will these work with my wheel spacers?

Extended length is designed specifically for spacer setups. Measure your stud protrusion with spacers installed to confirm adequate thread engagement—you want at least three full threads gripping the lug nut.

Do I need to clean these before installing?

Wipe each nut with a dry cloth before threading onto studs. No prep work or adhesive needed—hand-tight plus a final snug with a wrench is standard installation.

Can I reuse my old valve stem with these?

These are lug nuts only—valve stems are separate. Confirm your wheels are compatible with M12 x 1.25 hardware before purchase; adapter hardware is not included.