Carbon fiber rims are often seen as being stronger and more durable than aluminum rims. This is because carbon fiber is a very strong material that is also lightweight. Carbon fiber rims can be made to be very stiff, which makes them great for racing. However, they can also be made to be more flexible, which makes them better for riding on rough roads. Aluminum rims are also strong and durable, but they are not as light as carbon fiber rims.