my only comment on the one brake on a road bike with fast 700c tyres is, I've had a brake cable snap, luckily on a fixed bike so I could stop. would rather have 2 with a freewheel, just because I wouldn't want to damage my bike by crashing it. Which is why run a barely used brake on my fixed, cos I couldn't face damaging the frame if the chain snapped, or I come unclipped on a hill. I also run a 2 bmxs and a mtb with 1 brake, never had any dramas with those.
my only comment on the one brake on a road bike with fast 700c tyres is, I've had a brake cable snap, luckily on a fixed bike so I could stop. would rather have 2 with a freewheel, just because I wouldn't want to damage my bike by crashing it. Which is why run a barely used brake on my fixed, cos I couldn't face damaging the frame if the chain snapped, or I come unclipped on a hill. I also run a 2 bmxs and a mtb with 1 brake, never had any dramas with those.