Why the sudden popularity of 12 inch arms

A well executed 'drum brake' does indeed outperform a poor disc brake and there is nothing 2nd rate about drum brakes, if used in the appropriate application.
Sounds a lot like audio, too.

Bob P.

Zieman, you seem to suffer the malady of 'a little knowledge being a dangerous thing'. Your lack of knlowledge on vehicule braking systems and dynamics renders your credibility on other subjects suspect at best!

With respect, Bob P.

All emergency brakes (or parking Brakes) are drum brakes, usually on the rear wheels inboard of the rear disc brakes, if the car uses rear discs - many cars use rear drums.
All I am saying, is that a well executed drum brake will outperform a poor disc brake. its all in the execution of the design. Of course, a well executed disc will outperform a well executed drum brake, except, it seems, for an emergency brake! I shall Dr. Z to explain why and it has nothing to do with cot.

Bob p.