I switched out my drop bars for bullhorns with reverse/aero brakes. unlike my old brakes, these don't have any sort of spring in them, so when i brake I need to manually push the brakes back up, and the cables are really loose. If i tighten the cables, they rub on the wheels. I have the brake tension turned all the way up. Do reverse brake levers usually have a spring, or are they all like that? Thanks for the help!