The DB-100 bleed kit provides the syringes and threaded fittings needed to service Campagnolo hydraulic disc brake systems using mineral oil. The kit includes two syringes—one with a vented cap that allows air to escape during bleeding, and one without venting for pushing fresh fluid through the system. Thread size matters when you're connecting to Ergopower levers and calipers, so Campagnolo includes both M6 and M4 threaded fittings with corresponding hose segments. The M6 fitting with the short tube connects to the caliper bleed port, while the M4 fitting with the long tube attaches to the lever master cylinder.

Campagnolo's hydraulic system runs on mineral oil rather than DOT fluid, which means you can't substitute brake fluid from automotive sources or DOT-based bicycle brake systems. The specific viscosity and weight of Campagnolo's mineral oil maintains consistent lever feel across temperature ranges and provides the correct damping characteristics for their master cylinder design. Mineral oil also doesn't absorb water like DOT fluid, which eliminates the hygroscopic contamination issue that requires periodic fluid replacement regardless of visible condition. This bleed kit ships without mineral oil—you'll need to purchase Campagnolo's brake fluid separately in bottles ranging from small service volumes to larger shop quantities.

The bleed process follows a gravity-fed approach where you attach the syringe to the caliper bleed port and work fluid through the system from the bottom up, allowing air bubbles to rise naturally toward the lever reservoir. You'll need to remove the brake pads and install a bleed block spacer to prevent piston over-extension during the procedure. Campagnolo specifies torque values for the bleed port screws to prevent thread damage or leaks—these aluminum ports strip easily if you overtighten them during reassembly.... Read More