I need to know what size of Brakes were originally on a 1927 Model TT ford
The TT rear brake drums measure 12" diameter.
The brake shoes are 2" wide.
Dan's answer is correct.
If I'm telling you something you already know - just ignore me. Factory TT braking was designed just like the regular T's. They relied on the transmission brake as the service brake. The rear drums, although bigger on a TT, were primarily for parking and emergencies. The rear drums were used as a service brake when an outside after-market auxiliary brake package was installed.
Josh I tried to email you won't go, I have the brake shoes, linings and rivets you need email me email@example.com