Tire and rim demo

A demo of how you can model idler wheels for your robot. The shape of the tire is specifically to allow it to slide side to side, which is required for a slip-steering vehicle. It takes a lot of force to push the tire onto the rim, this is normal. The recesses are for 608 bearings, they're slightly oversized to allow for hole shrinkage. The dip on one side of the rim allows you to mount a shaft collar without it sticking out. Rimv2 is made for 4mm ID bearings, and has pockets on both sides. You need to space out this rim from the hull to prevent interference.

On the picture of my robot, the front two wheels are purchased RC wheels, which have a lot of grip and are attached to the motors. The rear wheels are the ones in this file, they have very little grip. This allows the robot to steer.