Widener is fit on 5mm center hole wheels.
If your wheel center hole is 4mm wide to make 5mm.
Main features:
CNC machined in Duralumin.
Easy installation
Add 13mm on each side of your truck
Fits 12mm hex wheels
Included
2.2"wheel widener (Blue color) x 4
M4 Barrel nuts (Length 14mm) x 4
M5 washer x 4
M5 spring washer x 4