What does the Park Tool Disc Brake Pad Spreader do?

The Park Tool PS-1 Disc Brake Pad Spreader is a must-have tool for any rider or mechanic who services hydraulic disc brakes. The tapered edge is designed to drive apart and reset hydraulic brake pads that have been accidentally engaged without a rotor present, a common issue after bleeding brakes or removing a wheel. The head of the PS-1 mimics a section of a disc brake rotor in shape and thickness, with strong stainless steel construction and a long vinyl-dipped handle for leverage and comfort.

The PS-1 can also be used as a temporary stand-in for the rotor when testing or bleeding a hydraulic brake system, which means you can pump the lever and check for proper fluid movement without needing to install and remove the wheel repeatedly. It is a small, inexpensive tool that prevents the larger expense of a contaminated brake pad or a damaged caliper from a forced pad reset with the wrong tool.