The Birzman Dummy Rotor (Disc Brake Pad Spacer) is a practical bicycle maintenance accessory designed to help prevent accidental engagement of disc brake pads when the wheel is removed during bicycle transportation, storage, or servicing. Installed inside the brake caliper in place of the disc rotor, this dummy rotor helps maintain separation between the brake pads while the wheel is off the bicycle.
Featuring a convenient spring-loaded clamp, the Birzman Dummy Rotor is designed to stay attached to the caliper during maintenance, helping free up your hands for other repair tasks. It supports compatible bicycle setups using Ø9 mm quick-release (QR) systems and Ø12/15 mm thru-axles, making it a useful accessory for bicycle mechanics, workshop technicians, and cycling enthusiasts.
Advanced Features and Benefits
Prevents Accidental Brake Pad Engagement: Helps keep disc brake pads separated when the wheel and rotor are removed, reducing the risk of the pads closing unintentionally.
Spring-Loaded Clamp Design: Helps secure the dummy rotor to the brake caliper, allowing you to work with greater convenience during maintenance.
Compatible Axle Configurations: Designed for compatible Ø9 mm quick-release and Ø12/15 mm thru-axle setups. Check your brake caliper and bicycle configuration before use.
Lightweight Construction: Weighing only 30 g, this disc brake pad spacer is convenient for regular workshop use and bicycle maintenance kits.
High-Polymer Material: The main body is made from high polymer, with steel bolts for the fastening mechanism.
Compact Dimensions: The 100 × 70 × 25 mm design supports convenient storage and handling.
Technical Specifications
Brand: Birzman
Product Name: Dummy Rotor
Product Type: Disc Brake Pad Spacer
Main Material: High Polymer
Bolt Material: Steel
Weight: 30 g
Dimensions: 100 × 70 × 25 mm
Axle Compatibility: Ø9 mm QR and Ø12/15 mm Thru-Axles
Primary Function: Helps prevent accidental brake pad engagement when the wheel is removed
Application: Bicycle transport, maintenance, and brake servicing
Applications and Recommended Use
The Birzman Dummy Rotor is suitable for road bikes, mountain bikes, and other bicycles equipped with compatible disc brake calipers. It is particularly useful when removing wheels for transportation, cleaning the bicycle, or carrying out maintenance where the disc rotor is temporarily absent.
Position the dummy rotor inside the brake caliper in place of the disc rotor according to the manufacturer's instructions. The spring-loaded clamp helps keep the tool in place while you perform other maintenance tasks. Always verify compatibility with your specific brake system before installation.
Important Care and Usage Instructions
• Cleaning: Wipe clean with water only.
• Intended Use: Use as a disc brake pad spacer when the wheel and rotor are removed.
• Do Not Use as a Piston Press: The dummy rotor is not designed to push brake pistons back into the caliper.
• Piston Retraction: For retracting pistons, use a suitable dedicated tool, such as the Birzman Disc Brake Piston Pusher (BM20-DBPP) or Birzman Double-Ended Piston Pusher (BM23-DPP), as recommended by the manufacturer.
• Safe Maintenance: Follow the brake system manufacturer's service instructions and avoid forcing the spacer into the caliper.
