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