The Axle Adapter give the option of using Matrix axles and Lead Screws with non standard sized axles and motor shafts. The Axle adapter pack contains two Axle Adapters that connect 6mm axles and shafts to standard Matrix 4mm axles. Each Axle adapter has a 4mm hole at one end and a 6mm hole at the other end.
Add serious traction to your Matrix robot with a pair of wide 96mm wheels. These wheels feature a super grip tire with aggressive tread bars that will grip any surface and aid in climbing over objects. The 96mm Wide Wheel Kit contains 2 wide wheels with hubs and all the required hardware