The Trickstuff Piccola Membrane Kit is an essential maintenance solution to maintain optimal performance of your Piccola hydraulic brakes, the lightest on the MTB market. This reservoir membrane (Ausgleichsbehälter) ensures the hydraulic system's seal and compensates for fluid volume variations related to temperature changes and brake pad wear.

Technical design and compatibility

Designed exclusively for the Trickstuff Piccola brake range (Piccola Carbon 2-piston, Piccola HD 4-piston Titanium, Piccola Carbon HD), this rectangular-shaped membrane (pay attention to orientation during installation) is made of high-performance elastomer resistant to Bionol mineral oil and high temperatures. The complete kit includes all elements necessary for replacement: the membrane itself, the reservoir cover screw, and an M5 bleed screw with its new O-ring.

Wear signs and preventive maintenance

• When to replace the membrane: Progressive loss of pressure point on descents, mineral oil leak through the reservoir cover opening, air in the system after bleeding, torn or deformed membrane visible upon inspection.
• Preventive maintenance: Trickstuff recommends annual inspection of the membrane, particularly after several years of intensive use. Users report exceptional durability, with some Trickstuff brakes still functioning perfectly after 10 years.
• Installation procedure: Disassembly of reservoir cover (Torx T6 screw), extraction of old membrane, aspiration of used fluid, installation of new membrane with respect to orientation (curvature outward), reassembly without pinching the membrane.

Piccola membrane kit highlights

• German manufacturing precision: Manufactured by Trickstuff GmbH in Pfaffenweiler, Germany, with strict tolerances to guarantee perfect sealing and consistent performance.
• Extended compatibility: Fits all Piccola lever models (carbon, 3D-printed titanium, aluminum) and 2 or 4-piston systems.
• Complete ready-to-install kit: All seals, screws and sealing parts provided, no additional purchase necessary.
• Durability and reliability: Material resistant to extreme temperatures (Bionol boiling point 290°C), UV and chemical aging.
• Easy installation: Simple procedure documented in Trickstuff service manuals, accessible to amateur mechanics equipped with basic tools.

Trickstuff philosophy: durability and repairability

Trickstuff designs its high-end Piccola brakes to be fully repairable and maintainable. Every component, from the membrane to the master piston including the ball bearings (4 per lever), can be replaced individually. This approach guarantees exceptional longevity of the braking system, while minimizing environmental impact. Piccola brakes, with their featherweight of 158 g (front, 70 cm hose) for the 2-piston Carbon models or 212 g (front) for the Piccola HD 4-piston Titanium, combine record lightness and braking power comparable to traditional 4-piston systems.

Piccola system technical specifications

• Hydraulic fluid: Bionol (biodegradable mineral oil, boiling point 290°C, low viscosity for light feel).
• Reservoir volume: 2.2 ml, sufficient for thermal management and fluid expansion.
• Hoses: High-pressure Kevlar or Goodridge, 5 mm diameter, standard lengths 900 mm (front) / 1700 mm (rear).
• Caliper mounting: Post-mount, compatible with discs up to 2.10 mm thickness.
• Reach adjustment: 2 mm Allen key on all Piccola levers.