Jagwire Bleed Blocks

Leaving your brake pads in during a bleed risks contaminating them with hydraulic fluid, which can ruin their stopping power. A bleed block holds the pistons in the correct position and prevents fluid from leaking onto the pads or rotors.

These blocks are designed with a universal fit in mind, making them compatible with the vast majority of two-piston and four-piston hydraulic disc brake systems on the market. They are a reliable, one-size-fits-most solution for most modern mountain and road bikes.

Different brake calipers have varying spacing requirements. Having three distinct blocks ensures you have the right thickness to properly set the piston depth for both two-piston and four-piston calipers without needing to hunt for proprietary tools.

These are strictly designed for the bleeding process. They should not be used to hold pistons open for storage or transport, as they are specifically shaped to maintain the correct spacing during fluid maintenance.

Yes, you must remove the wheel and the brake pads to insert the bleed block into the caliper. This ensures the pistons are held securely in place and protects your braking surfaces from any accidental fluid spills.