Purple 21-18 Ultra bee wheelspurple Ultra Bee Custom Wheel Set Take your Ultra Bee to the next level with our premium custom wheel sets, designed for both style and performance. These wheels are built to handle tough terrain while making your bike stand out from the crowd. Key Features: Sizes: 21x18 for the perfect combination of superior traction and handling. Custom Finishes: Available in a variety of colors, including unique designs like our silver paint splatter finish.