Wheels are fairly self-explanatory, but there are two main things to bear in mind.
- Compatability with cog/pulley
You can also choose the hardness of rubber on some wheels.
The biggest issue you need to overcome is making sure you are able to attach the correct sized cog in the drive train securely, like in the picture below.
The wheel and the pulley together make up the ‘flywheel’ in the drivetrain. The wheel needs to be able to have bolts secured through it and fit together with the cog. You could drill holes through the wheel if you feel comfortable enough, but you can buy wheels with gaps or holes already in.
Second to consider is the wheel size. The bigger the wheel, the higher the top speed but lower the acceleration. It takes more energy to move a larger wheel than it does a small one. Obviously, the main factors for top speed and acceleration are the motor and batteries – so don’t go thinking 100mm wheels will make you go 100 miles an hour.