These 28mm diameter (1.125in) diameter and overall width (including set-screw flange) of 17.03mm (0.67in) wide. Ideal for mini-sumo robotics..
The hub is drilled for a 3mm axle ideal for the GM12a-14a/18 series of gear motors!
It's a nice, fat, beefy wheel ideal for small robots!
Secure it to your motor shaft with the included 4-40 hex grub/setscrew (requires 0.050 hex wrench, like our HexW050).