Track-Grade 4-Piston Disc Brake Caliper for Electric Motorcycles & Bikes

Upgrade your ride with the Ruizuma M616 Large Radiation 4-Piston Hydraulic Disc Brake Caliper — engineered for riders who demand race-level braking precision, outstanding durability, and a bold motorsport aesthetic. Whether you're pushing hard on the track or fine-tuning your electric motorcycle build, this caliper delivers linear, controlled stopping power every time. Made in Mainland China.

🔥 Track-Level Braking Performance

Opposed 4-Piston Design: The classic large-radiation opposed four-piston layout distributes clamping force evenly across the rotor, minimizing uneven pad wear and delivering fast, linear braking response. Light squeeze gives confident feel; heavy braking stays composed and controlled — no unwanted lock-up.
High-Temperature Sintered/Ceramic Brake Pads: Paired with high-friction sintered or ceramic brake pads, this caliper maintains stable bite force through continuous downhill runs and multi-lap track sessions — no fade, no soft feel, just rock-solid stopping every time.

💪 CNC 6061-T6 Aluminum Alloy Construction

100% CNC Integrated Machining: Crafted from 6061-T6 aerospace-grade aluminum alloy with CNC one-piece precision machining for superior overall rigidity, impact resistance, and long-term high-load braking without deformation.
Anodized Surface Finish: Matte black hard anodizing delivers exceptional wear and corrosion resistance — fingerprint-resistant and long-lasting, staying looking sharp ride after ride.
Red RZMA Laser Logo: Industrial track aesthetics with tough, clean lines and a hardcore racetrack presence that complements virtually any motorcycle modification style.

⚙️ Precision Return & Smooth Feel

Built-in oversized return spring and anti-eccentric-wear guide pins ensure the pistons reset rapidly after brake release, reducing unnecessary pad drag, extending the service life of both pads and disc, and keeping your ride smooth and efficient.

🔩 Quality Hardware Included

Stainless steel rust-proof mounting screws + copper seals for long-term, leak-free operation.
Standard oil port interface — compatible with mainstream brake pumps and brake lines on the market, no additional adapters required.
Complete accessory kit included: installation screws, washers, guide pins — ready to install straight out of the box.

🛠️ Wide Compatibility

100mm Standard Hole Spacing — supports both left and right installation, precise hole positioning, no complex modifications needed.
Compatible with 220mm and 260mm rotors.
Fits the vast majority of electric motorcycles and standard motorcycles — ideal for modification builds and performance upgrades.
Model: JK26 | Material: 6061-T6 Aluminum Alloy

🏆 Rigorous Quality Testing

Every caliper passes high-pressure sealing tests, durability braking tests, and high/low temperature performance tests before leaving the factory — ensuring zero oil leakage, stable pressure retention, and dependable performance over the long term.

Related Products You May Like

For more information on motorcycle braking system safety standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What disc rotor sizes are compatible with this 4-piston brake caliper?

A: The Ruizuma M616 large radiation 4-piston brake caliper is compatible with 220mm and 260mm disc rotors, making it suitable for a wide range of electric motorcycles and standard motorcycle modification builds.

Q: Does this caliper require special tools or adapters to install?

A: No special adapters are required. The caliper uses a 100mm standard hole spacing and comes with a complete set of accessories including installation screws, washers, and guide pins, so it can be mounted directly onto most electric motorcycles and motorcycles without complex modifications.

Q: What material is the M616 brake caliper made from, and how is it finished?

A: It is CNC precision-machined from 6061-T6 aluminum alloy for maximum rigidity and impact resistance. The surface receives a matte black hard anodizing treatment for superior wear and corrosion resistance, keeping it looking sharp with minimal maintenance.

Q: Is this caliper suitable for track use, or only street riding?

A: The M616 is engineered to track-level standards, featuring high-temperature sintered/ceramic compatible brake pads and a 4-piston opposed piston design that maintains consistent, stable braking force through extended high-performance sessions — equally at home on the street or circuit.