![Proflow Brake Bias (Brake Proportioning Valve)](http://kjbparts.net/cdn/shop/files/IMG_1421_{width}x.jpg?v=1692320970)
Proflow brake proportioning valves are adjustable between 100 and 1000 PSI (depending on model) with a twist of a knob or the flip of a lever, and most can reduce pressure up to 57%. They let you adjust brake bias quickly and easily to compensate for changing track conditions, or for big and little tyre combinations.