180mm Wave Brake Rotor - 3-Bolt Scooters

180mm Wave Brake Rotor for GY6 and 139QMB Scooters

This 180mm wave brake rotor is designed to replace damaged or worn rotors on full-size scooters, such as many GY6 125cc/150cc and 139QMB 50cc models. Featuring a wave-cut stainless steel surface, this rotor provides reliable braking performance while effectively dissipating heat. It is one of the key scooter brake components to ensure your vehicle stops smoothly and safely.

Construction and Design

The rotor boasts a unique petal design with slotted and drilled holes that improve cooling and help clear brake dust, leading to better brake response. The vibrant red offset center hub adds a stylish touch while also featuring six vent slots for airflow. The rotor is built with a thickness of 3.5mm, ensuring stability during operation.

Installation and Maintenance

Installation of this rotor involves using a 3-bolt mounting pattern with a spacing of 57mm and bolt holes measuring 8.5mm in diameter. To ensure proper fitment, clean the hub surface before attachment and use thread locker on the bolts. It's advisable to bed in new pads and the rotor with several moderate stops to optimize performance prior to aggressive riding.

Specifications

• Material: Stainless Steel
• Size: 180mm Outer Diameter
• Inner Diameter: 48mm
• Thickness: 3.5mm
• Offset: 7mm
• Bolt Holes: 3
• Bolt Hole Spacing: 57mm
• Bolt Hole Diameter: 8.5mm
• Hub Color: Red
• OEM Part Number: 4793

Fitment

This rotor is compatible with GY6 125cc and 150cc scooters as well as 139QMB and QMB139 50cc scooters. It is important to verify that your existing rotor matches the specifications before making a replacement.

• GY6 125cc
• GY6 150cc
• 139QMB 50cc

Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.

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