Pro-Line 1/5 billet adapter washers
From Pro-Line is this set of four billet adapter washers for Raid 5.7″ 24mm wheels and other 1/5 wheel fitments on X-Maxx. This set includes 4 blue anodised wheel washers to reduce the through-hole size on the Raid wheel down to fit the X-Maxx sized axles. These also allow X-Maxx users to mount other popular 1/5 scale wheels on their rigs.
Source: Pro-Line [prolineracing.com]