Most cars and trucks of that era didn't have front brakes. Most brakes were mechanical so it would be hard(costly) to implement for the front steering axles. Most cars would barely do about 30mph. Trucks even way less. Speed limits in towns were 10-15mph. Most roads were still being shared with horses and horse-drawn wagons. Hydraulic brakes would only have been used on higher value cars. Most freight went by rail so overland trucks were very rare. Manufacturers only had to get their products to a rail depot.
I believe my '30 Chevy had mechanical brakes both on the front and the rear. It would do at least 55 mph, but it felt like going over Niagara Falls in a barrel. I also believe I recall reading that Chrysler was the first automobile mfg. to install hydraulic brakes, in the late 1920's. Besides mechanical brakes, the body frame was made of wood, and the windows and windshield were plate glass, not modern safety glass. The old king pin front end was worn, and it would shimmy when you hit a bump a certain way. No radio or heater, and a three on the floor non-synchro transmission. Autos have come a long way in the last 100 years; of course I think than old Chevy cost something like $440 new.