- 🛴 KuKirin Upgrades: XOD hydraulic brakes offer massive stopping power.
- 🛠️ Unique Designs: KuKirin G2 and G4 models require specific installation tricks.
- 🧠 Engineering Fact: Hydraulic dual-piston calipers are physically larger than factory mechanical ones, leading to tight clearances.
🌟 Trusted by KuKirin Riders
- ⭐⭐⭐⭐⭐ 4.8 Star Rating: Backed by nearly 50 verified customer reviews.(As of August 21, 2026)
- 🆚 Best Alternative: The most cost-effective, plug-and-play solution compared to complex Magura or Nutt brake mods.
- 🤝 Proven Success: Thousands of riders have already successfully completed this exact upgrade.
🛴 KuKirin G2 Secrets: The Rotor Spacer
If you own a KuKirin G2, the front fork space is incredibly tight. Upgrading requires a simple workaround:
- 📏 The 140mm vs 160mm Issue: Newer G2 models use 160mm rotors.
- ⚠️ The Rubbing Problem: Because XOD dual-piston calipers are wider than stock brakes, they may rub against the tire on a 160mm setup.
- ✅ Step1 (Change Rotor): Replace your stock rotor with a 140mm XOD Premium Universal Brake Rotor for instant clearance.
- ✅ Step2 (Add Shims to The Brake Discs.): Use a Brake Disc Shim/Spacer（4MM） between the motor and the brake rotor.
⚠️ Note: The included caliper bracket must be used during installation. When installing the screws, you must use the metal washers from the original caliper (at least two metal washers per screw are required to prevent the caliper body from coming into direct contact with the frame).
🛒 How to Get the Right Brake Disc Spacer
- 📏 Exact Dimensions: Thickness: 4mm (Recommended) | BCD: 44mm | Outer Diameter: 55mm | Inner Diameter: 33mm.
- 🔍 Where to Buy: Purchase link 🔗: XOD 44mm 6-Bolt Disc Brake Rotor Spacer – 4mm / 5mm for E-Bike & Electric Scooter
- 💡 Pro Tip: Buy a 2mm-4mm combination kit and stack them to achieve the perfect 4mm offset.
XOD 44mm BCD 6-Bolt Disc Brake Rotor Spacer – 4mm Thickness Dimensions
🛑 CRITICAL WARNING
- DO NOT SQUEEZE THE BRAKE LEVER before the caliper is securely mounted over the brake rotor.
- Squeezing the lever while the caliper is empty will push the pistons out completely, causing catastrophic oil leakage!
🚀 KuKirin G4 Secrets: Keep The Washers
For KuKirin G4 owners, the caliper upgrade is straightforward, but do not make this common mistake:
- 🔧 When removing the original mechanical calipers, you need to retain the original caliper brackets, bolts, and six metal washers.
- 💡 DO NOT throw away the metal washers!
- 🎯 You absolutely must reuse these original metal washers to perfectly center your new XOD hydraulic caliper over the brake rotor.
🔌 The Display Cable Mismatch
The KuKirin G2 and G4 displays use a proprietary internal wiring harness that does not instantly match universal e-bike brake sensors.
- 👀 As seen below, the internal connectors are highly specific.
- ✂️ The Hard Way: Cut your old mechanical lever's wire and solder it to the new XOD lever.
- ✨ The Easy Way: Purchase our custom adapter cable for a direct plug-and-play connection.
🛠️ Daily Maintenance & Expert Support
- 🛑 Monitor Pad Wear: Hydraulic brakes generate massive bite force, meaning brake pads wear out faster. Always use XOD Official Replacement Brake Pads to maintain peak performance.
- 📖 Follow Instructions: Before touching any screws, review our official Split-Type Installation Guide.
- 👨🔧 Don't Force It: If you get stuck, take your scooter and the XOD kit to a local scooter repair shop.
- 💬 We Are Here To Help: Have an installation question? Email our technical team at service@xodbrakes.com. We guarantee a reply within 24 hours on business days!