Position 01
Front Brake
- Front dual-piston hydraulic caliper
- Matching hydraulic brake lever
- Front hydraulic hose (1350mm)
- Pre-installed brake pads
- Spacer is included selected
Product description
KuKirin G2 Series & G4 Critical Notice
Upgrading these specific models requires strict attention to clearances to avoid crushing your new calipers:
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G2 Pro (23 vs 24): Front caliper choice changes based on the production year.
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G2 Pro (Clearance): You MUST install a 5mm front brake disc spacer.
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G2 Max (Warning): Maintain a >2mm gap before tightening to avoid caliper damage.
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G4 Caliper: DO NOT throw away the original factory metal washers.
Must Read: 5 Mistakes to Avoid (G2 Pro & G2 Max Upgrade Guide)
NUTT Dual Piston
Controlled braking for your KuKirin upgrade
NUTT system uses an open hydraulic design with dual-piston calipers, forged aluminum construction, and mineral brake fluid. Select the correct position and confirm fitment before installation.
- Open system, dual piston
- Forged aluminum caliper body
- Internal or swivel hose routing
- Heat-dissipating pad compatibility
- Adjustable reverse-version caliper
- Black forged aluminum lever
Product Specifications
Confirm the final configuration and SKU before purchasing.
| Applicable Model | KuKirin Electric Scooter Models |
|---|---|
| Brake Type | 2-Piston Hydraulic Disc Brake Upgrade Kit (Front & Rear) |
| Brake Pad Options | Ceramic brake pads & Copper-based brake pads |
| Matching Rotor | 140/160 × 1.8mm Brake Rotor, Uniform Clamping Force |
| Hose Spec | Front: 1350mm | Rear: 2200mm (L1 Straight Leakproof Joint) |
| Pre-Filled System | Pre-bled brake lever for hassle-free installation |
| Safety Function | Integrated instant motor power-off sensor |
| Material Feature | Wear-resistant & rust-proof aluminum alloy |
| Mount Type | IS standard mount & Post mount options |
What's Included
Package contents vary by selected position.
Position 02
Rear Brake
- Rear dual-piston hydraulic caliper
- Matching hydraulic brake lever
- Rear hydraulic hose (2200mm)
- Pre-installed brake pads
- Spacer is included selected
Recommended
Front & Rear Set
- Front & Rear dual-piston calipers
- Left & Right brake levers
- Front (1350mm) & Rear (2200mm) hoses
- Brake pads for both positions
- Complete mounting hardware set
Best value for full braking system upgrade.
Fitment reminder: Adapter cables, rotor spacers, and washers may vary by KuKirin model and production year. Contact us if unsure.
Choose the Right Braking System
Compare the key differences between standard mechanical brakes and the NUTT 2-piston hydraulic brake system.
Ordinary Brake
Standard cable-driven system
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Braking Performance: Slow response, unstable stop
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Sensor Feature: No power-off sensor, circuit risk
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Sealing Structure: Poor sealing, easy oil leakage
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Installation: Requires modification & adaptors
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Piston Structure: Plastic 2-piston, easy deformation
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Tube Length: Fixed tube length only
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Warranty: 6 Months short warranty
NUTT Hydraulic Brake
Advanced 2-piston hydraulic system
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Braking Performance: Sensitive & stable braking
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Sensor Feature: Built-in power-off sensor protects motor
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Sealing Structure: Leak-proof sealing, low maintenance
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Installation: Direct bolt-on replacement
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Piston Structure: 2-Piston CNC Aluminum Body
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Tube Length: Custom 1350/2200mm lengths
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Warranty: 1 Year warranty