Just finished building a gorgeous commuter from a fixed track frame. I've got some nice fat 700x28 tires, a SRAM automatix hub in the rear, and a disc compatible front hub. The frame has mounts for rim brakes but lacks any elegant way to route the back brake cable across the top tube.
I've currently got it wrapped up with some fabric handlebar tap and may end up making a nice stitched leather top tube protector BUT I'm super curious...what if I skipped the back brake all together and just did ONE disc brake up front?
Obviously I'll have to perfect a nice progressive squeeze so as not to go over the front and I'll definitely have to get used to shifting my weight back a bit when I brake (especially on hills) but what other down sides are there to this?