VEX Robotics 4in wheel rim blank

Ever wanted to make your own custom rims for your VEX robot?
Use this base rim to customize your own rim. Included is the STL file and the Inventor Part File.
Designed to be used with these 4" VEX wheels to replace the hub that comes with them.
http://www.vexrobotics.com/vex/products/accessories/motion/276-1489.html
http://www.vexrobotics.com/vex/products/accessories/motion/276-1497.html