Fillet Brazing is otherwise known as Luggless Construction because the framebuilder is free to use any angle and any tube diameter, in other words not limited to the constraints posed on the builder by using lugs. It is also argued to be the most aesthetically pleasing of all the joining methods. A high quality fillet brazed joint gives the illusion of one tube seamlessly blending in to another.

A high quality fillet brazed joint gives the illusion of one tube seamlessly blending in to another. Layering brass over the joint, then filing or sanding away any excess to leave a smooth radius accomplishes this effect.

The filler material used here is brass, which turns molten at around 1500 degrees farenheight. The frames produced by fillet brazing are as strong as using any other joining method.

Fillet Brazed frames tend to be a little heavier than a lugged frame due to the amount of filler material used in the construction of the joint, for this reason these frames might be more suited for a mountain or touring bike, however roadies might also find them asthetically pleasing as well.