What are the key features to consider when selecting a bicycle frame, particularly in terms of rear dropouts?

When selecting a bicycle frame, key features to consider for rear dropouts include their material, design, and compatibility with the type of wheel axle you plan to use. The rear dropouts play a crucial role in securing the wheel to the frame and affect the overall stability and performance of the bike. Make sure to choose dropouts that are durable, compatible with your wheel axle type, and provide a secure and reliable connection between the frame and the wheel.