Custom-Tuned Braking. 100% Repairable Engineering.
The ξ /ksi/ cycling slave cylinders are the world’s first fully customizable and repairable slave cylinders designed exclusively with bike trials in mind.
Standard hydraulic slave cylinders are disposable—once they leak or degrade, you throw them away. We engineered ours from the ground up to be completely modular. You can take them apart, clean them, replace seals, and regrease them to maintain that “brand-new” sharp lever response for years.
Choose Your Perfect Configuration (8 Unique Versions)
Every rider has a unique style. We offer 8 distinct technical configurations so you can fine-tune the exact balance of weight, structural stiffness, and return-spring tension for your bike:
| Version | Ti/SS Parts | Piston | Spring | Weight |
| Ti-PET-N | Grade 5 – Ti | PET-P | Normal | 78.3gr |
| Ti-PET-H | Grade 5 – Ti | PET-P | Hard | 79.0gr |
| Ti-Alu-N | Grade 5 – Ti | 7075-T6 | Normal | 84.7gr |
| Ti-Alu-H | Grade 5 – Ti | 7075-T6 | Hard | 85.3gr |
| SS-PET-N | 316 SS | PET-P | Normal | 85.9gr |
| SS-PET-H | 316 SS | PET-P | Hard | 86.5gr |
| SS-Alu-N | 316 SS | 7075-T6 | Normal | 91.2gr |
| SS-Alu-H | 316 SS | 7075-T6 | Hard | 91.8gr |
Hardware Breakdown:
- Titanium vs. Stainless Steel: Choose Grade 5 Titanium for ultimate weight savings and save about 7gr over the 316 Stainless Steel option.
- Aluminum vs. PET-P Pistons: 7075-T6 aluminum pistons deliver the stiffest, most unyielding bite possible. PET-P pistons offer extremely low friction for an ultra-smooth lever pull.
- Normal vs. Hard Springs: Hard springs force the brake pads to retract instantly when you let go of the lever but make the lever feel a bit harder to pull.
Professional Support Ecosystem
To ensure your custom cylinders always perform at a world-class level, we provide a dedicated support ecosystem:
Technical Service Protocol: A step-by-step System Manual to guide you through cleaning, greasing, and tuning.
Specialized Service Center: Send us your slave cylinders, and we’ll return them fully cleaned, refreshed with new seals, re-greased, and tested — ready to ride again.
Dedicated Service Tools: Specialized tools engineered to dismantle and rebuild your cylinders safely.
Pro Bleeding Kits: Designed for an air-free, rock-solid hydraulic line setup.
You can buy these slave cylinders at our official store by following this link.