A fluid-actuated disc brake set that arrives pre-bled and ready to install on most MTB and e-bike frames. The mineral oil system self-adjusts as pads wear, so brake feel stays consistent without frequent manual cable tension corrections. Hose lengths cover standard front and rear runs without needing to cut or re-bleed out of the box.

• 4-Piston Aluminum Caliper – CNC-machined body with 4×18mm composite pistons. The four-piston layout spreads clamping force more evenly across the rotor, which helps with heat management on longer descents compared to two-piston designs.
• Mineral Oil Hydraulic System – Less hygroscopic than DOT fluid, so it absorbs less moisture over time. Safer to handle during bleeds and won't damage paint or seals on contact. Not compatible with DOT fluid — do not mix.
• Pre-Bled Hose Lengths – Front hose 1100mm, rear 1600mm. Fits most standard MTB and e-bike frame geometries without requiring a re-bleed on arrival. If your frame runs longer lines, contact us before ordering.
• Rotor Compatibility – Works with 140mm, 160mm, 180mm, and 203mm rotors via IS or post mount adapter (adapter not included). Rotors are not included — size selection depends on your frame and fork mount spec.

What's in the box:

• 1x Brake Lever
• 1x 4-Piston Caliper
• 1x Pre-Bled Hose (1100mm front or 1600mm rear — specify at checkout or in order notes)