Birzman is back with another round of cleverly designed tools. If you’ve ever worked on hydraulic disc brakes, at some point, you’ve had to reset the pistons in the caliper. In the past, that has required specially shaped ‘spatulas’ that you wedge between the brake pads and lever the two sides apart. While effective, those tools require you to remove the wheel and brake rotor, and can lead to damage to the brake pads themselves. The Birzman Disc Brake Piston Pusher changes that.
Instead of removing the wheel (on top loading brake calipers), with the Birzman tool, you remove the brake pads. That provides enough room between the pistons and the rotor to slip the tool into place.
Once in place, instead of prying the two sides apart which can apply uneven pressure, the Birzman tool expands evenly with the threading motion of the handle. This way, you get smooth even pressure on both sides of the caliper and without damage to the brake pad since it’s been removed.
The tool is compatible with bottom loading calipers as well, though it might require removal of the caliper from the bike.