outer diameter 82MM, width 35MM, inner diameter hex-to-edge distance 12MM (this shop has a matching coupling, 4, 5, 6MM axis refers to how much motor shaft can be installed, For example, if your motor shaft is 4.89mm diameter, you can choose 5MM long shaft connector.
Weight: 57g
Materials:
The hub is made of reinforced nylon, which is very strong. The tire is made of high quality rubber, Microsoft, the friction coefficient is large, the load capacity is very good, and the grip ability is very good (the outer diameter is measured under no load, and will be reduced after loading heavy objects)