Pro-Line Racing 271315 Titus 2.2 Black/Black Bead-Loc Wheel (2-Pack) New 3-Piece easy to assemble wheel design Aluminum die-cast bead-loc with Pro-Line USA insignia Extremely detailed injection molded wheel design available in black wheel with a black ring 12mm hex for use with traditional rock crawling stepped 12mm hexes, 1:16 Mini E-REVO 12mm hexes, as well as non-stepped 12mm hexes Mini E-REVO users should be aware that increased tire diameter and overall weight will add additional load to the vehicles drive train