What are the different types of bottom brackets used in MTB (mountain bike) frames and how do they affect the performance of the bike?

There are three main types of bottom brackets used in MTB frames: threaded, press-fit, and PF30. Threaded bottom brackets are known for their durability and ease of maintenance. Press-fit bottom brackets are lighter and can provide better power transfer, but may require more maintenance. PF30 bottom brackets offer a balance between the two, providing a good combination of weight savings and durability. The type of bottom bracket used can affect the stiffness, weight, and overall performance of the bike.