Rear Brake Line Size: 3/16" or 1/4"?

[Bob Barry]

I've got to replumb my entire brake system, and was wondering about what size line I should run to the rear. My choice is to go 3/16" or 1/4" all the way back to the hose. This is for rear Eldorado disc brakes. I'm thinking 1/4" line would provide the necessary volume, but I'm going to be running it through an adjustable proportioning valve that has a 3/16" fitting on each side. I recall something of my high-school physics class regarding the relation of pressure, cross-section and volume, but am not sure whether my idea is on target or not.

What size line are you guys with rear disc brakes running?

[River Beast]

Bob,

my line from the prop valve is 1/4" then T's to 3/16" at the axle..

I will keep this setup for the Eldo calipers as well