The IIIPRO IV2 2-Piston Hydraulic Disc Brake Set offers an exceptional blend of crisp stopping power, featherweight performance, and long-term reliability. Precision CNC-machined from high-strength magnesium-aluminium alloy, this set reduces rotational and overall bike weight while maintaining a stiff caliper design that eliminates flex under hard braking efforts.
Equipped with a dual-opposing piston configuration, the IV2 ensures balanced, predictable modulation and smooth lever feedback across all terrain types. Using low-maintenance mineral oil fluid, the system provides stable performance through varying temperatures without the corrosive drawbacks or frequent service requirements of DOT fluids.
This complete pre-bled brake set comes ready for installation, featuring an 850mm front line and a 1550mm rear hose. Compatible out-of-the-box with standard 160mm rotors (and adaptable up to 220mm), it serves as a ideal upgrade for cross-country mountain bikes, trail setups, commuter builds, or light e-bikes seeking dependable performance.
Precision CNC Machined Alloy: One-piece magnesium-aluminium construction provides maximum stiffness and heat dispersion at a low weight.
Smooth 2-Piston Modulation: Dual opposing pistons deliver balanced pad movement for predictable control and even pad wear.
Pre-Bled Mineral Oil System: Arrives fully bled with high-performance mineral oil for immediate bolt-on installation and easy maintenance.
Material: Magnesium-aluminium alloy (CNC machined)
System Type: Hydraulic 2-piston caliper set
Fluid Type: Mineral oil
Hose Lengths: Front 850mm / Rear 1550mm
Weight: Front ~210g / Rear ~215g (excluding rotors and adaptors)
Rotor Compatibility: 160mm native (140mm–220mm supported with adaptors)
✅ Weight-Conscious XC & Trail Riders: At roughly 425g for the pair, it is an excellent choice for keeping your cross-country or trail bike light and nimble.
✅ Simple Plug-and-Play Setup: Pre-bled hoses mean you can bolt the levers and calipers straight onto your bike without hassle.
✅ Dependable Daily Braking: Smooth, linear lever feel combined with easy-to-service mineral oil makes it ideal for everyday commuting and trail riding.
❌ Heavy-Duty Downhill & E-MTB: Riders tackling extreme downhill tracks or heavy e-MTBs may prefer 4-piston options like the IIIPRO IV4 for maximum ultimate stopping power.
❌ Non-Standard Hose Routing: Extremely large frames or bikes requiring internal cable routing through tight headset ports may necessitate disconnecting and re-bleeding lines.
❌ Integrated Drop-Bar Setup: Designed specifically for flat handlebar setups and incompatible with drop-bar road or gravel brake levers.
When installing your new IIIPRO IV2 brakes, ensure your wheel axles are fully tightened in the dropouts before aligning the calipers. Loosen the caliper mounting bolts slightly, pull the brake lever firmly to self-centre the pads on the rotor, and torque the bolts down evenly while holding the lever locked—this guarantees a drag-free, silent setup!
