140mm Heavy-Duty Replacement Brake Disc | Kids’ Electric Balance Bike Stop on a dime and ride with confidence. This Stainless steel, 2mm, 140mm replacement brake disc is engineered specifically for the high-demand environment of kids' electric balance bikes. Whether they are hitting backyard trails or competing on the track, reliable stopping power is the most important safety feature on the bike. Designed as a direct replacement for worn, warped, or heat-stressed rotors, this disc provides a consistent friction surface for your brake pads. The 140mm diameter offers the perfect balance of heat dissipation and clearance, ensuring your young rider stays in control even during long downhill descents or high-speed sessions. Key Performance Features Enhanced Stopping Power: Delivers crisp, responsive braking to help kids manage their speed safely. Vented Heat Dissipation: Features a precision-drilled pattern to reduce heat buildup and prevent brake fade during aggressive riding. Universal 160mm Fitment: Standard sizing fits most major electric balance bike brands (XRT, Thumpstar, Stacyc-style builds, and more). High-Carbon Steel Construction: Built for durability and resistance to warping, ensuring a longer lifespan than stock "soft" rotors. Compatibility & Specs Upgrade your bike’s safety and performance with a rotor that can handle the extra weight and speed of an electric motor. Size: 160mm Outer Diameter Compatibility: Fits 12", 16", and 20" electric balance bikes utilizing a standard 6-bolt (please verify your hub pattern before ordering). Condition: 100% Brand New Replacement Part. Ideal For: Motocross-style balance bikes, e-bikes, and heavy-duty electric scooters. Why Replace Your Rotor? Over time, heat and debris can cause "glazing" or warping on a brake disc, leading to squealing, vibration, or reduced stopping power.1 Replacing your rotor alongside new brake pads is the best way to restore that factory-fresh braking feel and ensure your child’s bike is track-ready. Safety Note: We recommend professional installation or a thorough check of all mounting bolts (using blue Loctite) to ensure the rotor is secure before the first ride.
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