Newly customized wheel with outer rubber tyre and ABS as the rim. No additional coupling is needed, the center of rim fit perfectly with D shape 6mm round shaft :)
It is designed to fit:
SPG30 DC Geared Motor
SPG30E, DC Geared Motor with Encoder
SPG50 DC Geared Motor
IG32E, Planetary Geared Motor with Encoder
* Outer Diameter = 80mm.