The Trickstuff Membrane + Piston Kit is the professional solution to service and maintain the exceptional performance of Direttissima and Maxima braking systems. Designed with the legendary German precision of the Pfaffenweiler factory, this complete kit guarantees perfect sealing and optimal braking performance for demanding riders in MTB Enduro, DH and Gravity.

Technical Summary

This service kit combines high-performance seals and precision-machined stainless steel pistons, specifically developed for Maxima four-piston calipers (2 × 16 mm + 2 × 17 mm). Compatible with mineral fluids and Bionol, it ensures flawless sealing and significantly extends the braking system's service life. The quad rings (square-section seals) offer superior dimensional stability and increased resistance to extreme temperatures encountered in downhill riding.

Technical Highlights

• Complete Maxima caliper kit: Includes 4 polished stainless steel pistons, 4 high-performance quad rings, 1 half-caliper O-ring, 2 banjo fitting O-rings and 1 M5 bleed screw with seal
• Premium stainless steel pistons: Polished surface for optimal heat dissipation and prevention of hydraulic system overheating, ensuring consistent modulation even on the most demanding descents
• Trickstuff-specific quad rings: Square-section seals offering superior sealing compared to conventional O-rings, exceptional dimensional stability and increased longevity
• Extended compatibility: Designed for Maxima calipers (reference MXASSETK with pistons); separate kits exist for Direttissima and Maxima pumps/levers (GTIN 4251189805481) and seals only without pistons (MXASSETD)
• German manufacturing: Machined and assembled in Pfaffenweiler with Trickstuff quality standards, guaranteeing precision, reliability and lasting performance
• Simplified installation: Complete kit facilitating maintenance and refurbishment of calipers, allowing experienced mechanics and passionate cyclists alike to keep their brakes in optimal condition

Compatibility and Use

This service kit is specifically designed for Maxima brake calipers, Trickstuff's high-end gravity braking system equipped with four asymmetric pistons (2 × 17 mm and 2 × 16 mm). It is suitable for all riders using mineral fluid or Bionol (Trickstuff's proprietary vegetable oil). The stainless steel pistons contribute to the exceptional thermal management of the Maxima system, reducing heat transfer and maintaining bite point consistency even during prolonged descents.

Available Variants

• Complete kit with pistons (MXASSETK): EAN 4251189805597 — For complete Maxima caliper service including 4 stainless steel pistons + all seals
• Seals-only kit (MXASSETD / BSNSMXAON0000S): Without pistons — Includes only the 4 quad rings, caliper and banjo fitting O-rings, plus M5 bleed screw
• DRT/MXA pump/lever kit: GTIN 4251189805481 — Separate kit for servicing master pistons and seals of Direttissima and Maxima levers (sold separately)

Maintenance and Longevity

Using this service kit allows you to restore the original performance of Maxima brakes and ensure their long-term reliability. Trickstuff recommends replacing seals and pistons whenever there is power loss, leaks appear, or after intensive competition use. The high-performance quad rings resist extreme conditions (heat, mud, high hydraulic pressure) and guarantee precise modulation and consistent power. Compatible with Trickstuff 730 POWER+ pads (Hope V4 profile), this system offers ultimate safety and control on all terrain types.