Set of four 17 mm gray-anodized aluminum wheel hubs combine high-profile looks with superior strength. The special splined design locks into Traxxas splined wheels for precise alignment and unsurpassed grip. Includes 4×5 mm grub screws (4), and 3×14 mm pins (4). PLEASE NOTE: Maxx^® and Maxx Slash^® models require 8950X (standard width) or 8996X (WideMaxx^®) Steel constant-velocity driveshafts for compatibility.