What types of wheels and axles on a bike?

1. Front Wheel and Axle:

- Wheel: The front wheel is usually smaller in diameter compared to the rear wheel and is designed for steering and balance.

- Axle: The front axle is typically a solid rod that passes through the center of the wheel and is secured by nuts or bolts. It is shorter and thinner compared to the rear axle.

2. Rear Wheel and Axle:

- Wheel: The rear wheel is usually larger in diameter than the front wheel and is responsible for transmitting power from the pedals to the ground.

- Axle: The rear axle is a longer, thicker rod that also passes through the center of the wheel. It is secured with nuts or bolts and often incorporates a hub with bearings to allow smooth rotation.

Both the front and rear wheels and axles are designed to facilitate steering, rolling, and support the weight of the bike and rider while providing stability and maneuverability.