The IIIPRO Flat Mount Cable-Actuated Hydraulic Disc Brake Calipers offer an ideal solution for cyclists looking to upgrade their stopping power without committing to a costly, full hydraulic groupset replacement. Featuring a "cable-in, hydraulic-out" hybrid design, these calipers work directly with standard mechanical drop-bar brake levers. A traditional steel inner cable actuates the short-pull arm on the caliper, which in turn drives a sealed internal hydraulic master cylinder and dual opposing pistons.
Crafted from lightweight forged aluminum alloy and precision CNC-machined, these calipers offer exceptional structural rigidity and clean aesthetic integration with modern flat-mount road and gravel frames. The dual-piston synchronous drive pushes both brake pads simultaneously against the rotor. This eliminates the rotor flexing and uneven pad wear typical of single-piston mechanical disc brakes, providing improved modulation, reduced lever effort, and consistent stopping power across all weather conditions.
Designed for effortless maintenance and installation, IIIPRO hybrid calipers use standard Shimano-style disc brake pads and mineral oil, making replacements and system bleeding straightforward for home mechanics. They offer full compatibility with 140mm and 160mm rotors using standard flat-mount adaptors.
Dual-Piston Hydraulic Actuation: Simultaneously drives both brake pads inward to deliver smooth, balanced modulation and even pad wear.
Hybrid Cable-Hydraulic Design: Allows you to retain existing mechanical road or gravel shifter levers while upgrading to hydraulic stopping power.
Precision CNC-Machined Aluminum: Lightweight and rigid forged alloy body resists flex under heavy braking for crisp, immediate lever response.
Mount Type: Flat Mount (70mm front / 34mm rear bolt spacing)
Material: CNC-machined forged aluminum alloy
Weight: Approx. 280g per pair (calipers only)
Fluid Type: Mineral oil
Rotor Compatibility: 140mm and 160mm (with appropriate flat mount adaptors)
Pad Compatibility: Shimano-style B01S / K03S / L03A shape pads
✅ Cost-Effective Hydraulic Upgrade: Delivers hydraulic braking force and modulation while reusing your current mechanical gear levers.✅ Simple Maintenance: Uses readily available Shimano-style replacement brake pads and mineral oil bleeding systems.✅ Dual-Sided Engagement: Both pistons clamp synchronously, preventing rotor warping and chatter associated with single-sided mechanical calipers.
❌ Full Hydraulic Seekers: Does not offer the completely sealed, zero-cable-friction feel of a true full-hydraulic groupset.
The IIIPRO Flat Mount Cable-Actuated Hydraulic Disc Brake Calipers offer an ideal solution for cyclists looking to upgrade their stopping power without committing to a costly, full hydraulic groupset replacement. Featuring a "cable-in, hydraulic-out" hybrid design, these calipers work directly with standard mechanical drop-bar brake levers. A traditional steel inner cable actuates the short-pull arm on the caliper, which in turn drives a sealed internal hydraulic master cylinder and dual opposing pistons.
Crafted from lightweight forged aluminum alloy and precision CNC-machined, these calipers offer exceptional structural rigidity and clean aesthetic integration with modern flat-mount road and gravel frames. The dual-piston synchronous drive pushes both brake pads simultaneously against the rotor. This eliminates the rotor flexing and uneven pad wear typical of single-piston mechanical disc brakes, providing improved modulation, reduced lever effort, and consistent stopping power across all weather conditions.
Designed for effortless maintenance and installation, IIIPRO hybrid calipers use standard Shimano-style disc brake pads and mineral oil, making replacements and system bleeding straightforward for home mechanics. They offer full compatibility with 140mm and 160mm rotors using standard flat-mount adaptors.
Dual-Piston Hydraulic Actuation: Simultaneously drives both brake pads inward to deliver smooth, balanced modulation and even pad wear.
Hybrid Cable-Hydraulic Design: Allows you to retain existing mechanical road or gravel shifter levers while upgrading to hydraulic stopping power.
Precision CNC-Machined Aluminum: Lightweight and rigid forged alloy body resists flex under heavy braking for crisp, immediate lever response.
Mount Type: Flat Mount (70mm front / 34mm rear bolt spacing)
Material: CNC-machined forged aluminum alloy
Weight: Approx. 280g per pair (calipers only)
Fluid Type: Mineral oil
Rotor Compatibility: 140mm and 160mm (with appropriate flat mount adaptors)
Pad Compatibility: Shimano-style B01S / K03S / L03A shape pads
✅ Cost-Effective Hydraulic Upgrade: Delivers hydraulic braking force and modulation while reusing your current mechanical gear levers.
✅ Simple Maintenance: Uses readily available Shimano-style replacement brake pads and mineral oil bleeding systems.
✅ Dual-Sided Engagement: Both pistons clamp synchronously, preventing rotor warping and chatter associated with single-sided mechanical calipers.
❌ Full Hydraulic Seekers: Does not offer the completely sealed, zero-cable-friction feel of a true full-hydraulic groupset.
❌ Ultra-Lightweight Racers: Slightly heavier than minimalist full-hydraulic flat-mount calipers due to the internal cable arm and piston assembly.
❌ MTB Post-Mount Frames: Built strictly for flat-mount road, gravel, and CX frames/forks.
Pair these hybrid calipers with high-quality compressionless brake cable housing (such as Jagwire Pro Compressionless). Standard spiral-wound housing flexes under tension, absorbing lever force before it reaches the caliper. Compressionless housing ensures every millimetre of lever pull translates directly into hydraulic piston pressure, giving you a firm, responsive lever feel!
❌ Ultra-Lightweight Racers: Slightly heavier than minimalist full-hydraulic flat-mount calipers due to the internal cable arm and piston assembly.❌ MTB Post-Mount Frames: Built strictly for flat-mount road, gravel, and CX frames/forks.
Pair these hybrid calipers with high-quality compressionless brake cable housing (such as Jagwire Pro Compressionless). Standard spiral-wound housing flexes under tension, absorbing lever force before it reaches the caliper. Compressionless housing ensures every millimetre of lever pull translates directly into hydraulic piston pressure, giving you a firm, responsive lever feel!
