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ONIRII M4 4 Piston Hydraulic Disc Brake Bicycle Brake MTB AM HD 820/1450mm Mountain Clamp Brakes CNC Tech Mineral Oil AM New
ONIRII M4 4 Piston Hydraulic Disc Brake Bicycle Brake MTB AM HD 820/1450mm Mountain Clamp Brakes CNC Tech Mineral Oil AM New
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SPECIFICATIONS
Brand Name: ONIRII
Origin: Mainland China
Braking System: Hydraulic Disc Brake (Hydraulic Brake Pad)
Model Number: M4
Size: 4 piston
Type: Hydraulic Disc Brake
Components: Disc Brake
Use: Mountain Bikes
Material: aluminum
Due to SKU quantity restrictions, if you need other colors please contact customer service
New to the store, 30% off exclusively for store fans
4 piston MTB hydraulic brake-new upgraded model
Brand: ONIRII
Model: 4 piston
Brake pads: same as hope pads, E4 M4 resin pads
Brake oil: mineral oil
Rotor size: 160/160mm
Accessories: with oil pin and screws
Oil needle and olive tip model: BH59
Oil hose diameter: 5mm
Suitable for: ONIRII 4 piston hydraulic brakes are suitable for XC, climbing, DH, AM and other mountain bikes or action bikes
After installing CD-02, CD-03, six-hole discs only for road bikes and XC mountain bikes
Weight: Single front brake:234g/0.5 lb (wight ) 82cm/32 inch (length)
Single rear brake: 250g/0.55lb (wight ) 145cm/57 inch (length
One pair of brakes: 483g/1.06 lb
*The 4 piston brakes you received are already installed with pads and filled with oil inside.
What changes have we made with the new upgraded 4-piston brakes?
New brake handle:
① Clamping ring
② Brake stroke adjustment screw, the model is M5(Upgraded new features)
③ Clamping ring screw
④ Oil filling screw
⑤ Oil type
⑥ CNC brake cylinder
⑦ Brake bearing rotation point
⑧ CNC brake handle grip
Brake handle screw model frequently asked by buyers
Caliper Screws
The interior of the brake handle has been updated with an oil bladder structure
This 4-piston brake uses CNC one-piece 4-piston caliper, which maintains good stability and rigid braking power while also minimizing weight. The brake interior uses imported seals, which are more heat and cold resistant and can withstand temperatures as low as -40° and as high as 220°
Old brake handle:
Caliper part:
① CNC one-piece calipers
② Heat dissipating brake pads(Upgraded new features)
③ Pad Bolts
④ Oil hose screw
⑤ Oil Injection Screw
⑥ Piston cover
ONIRII M4 hydraulic brakes feature a CNC integrated brake handle, bearing rotation points for enhanced braking feel, upgraded cylinders to provide sufficient oil volume, and mineral oil for the brake fluid.
Product installation effect
Germany TUV safety certification
Measured braking power up to 641N
FAQs and Answers:
Question 1, Why does my rotor keep rubbing against the brake pads and making noise?
Answer: The main reason for this phenomenon is that the gap between the brake pads is too small, you can control the brake pad gap by adjusting the screws that hold the brakes to the frame to ensure that the proper clearance is given to the rotor, the other reason is that the rotor is deformed, you can use a tool to straighten the deformed rotor or replace it with a new rotor
Question 2, Why is my brake making noise during braking?
Answer: This may be due to grease from your hands getting on the brake pads when installing the brakes, please pay attention to this issue during the installation process, another reason is that you are using metal brake pads, and it is normal for metal brake pads to make noise
Question 3, Why do my brakes have insufficient braking power during braking?
Answer: This situation is caused by 2 reasons, one is the lack of oil inside the brakes, you can solve it by replenishing the oil, the other is that the air enters into the brakes when filling the oil, which leads to insufficient braking power, you can also solve this problem by re-filling the oil, and there is also another reason is that the rotors and pads do not have enough wear, you can use the brakes many times when riding on the downhill to wear out the pads and rotors to make it reach a perfect braking power.
Question 4, What bleeding kit should I use?
Answer: Generally, all the oiling kits on the market can be used, if you really don't know what oiling kit to buy, you can choose EZMTB.
