ZTTO Disc Brake Adapter – PM to FM Conversion

Durable Aluminum Construction
Crafted from high-strength aluminum alloy, this disc brake adapter is built to withstand harsh riding conditions while remaining lightweight and corrosion-resistant. It's an ideal upgrade for cyclists looking for performance and reliability.

Convert Post Mount to Flat Mount
Designed to convert a 74mm Post Mount (PM) frame or fork to fit a 35mm Flat Mount (FM) brake caliper. This setup is perfect for riders upgrading to modern road or gravel braking systems without needing a new frame or fork.

F6R6 Configuration – Maintain Rotor Size
The F6R6 version allows you to keep your original rotor size: Use 140mm rotors with a 140mm PM frame/fork
Use 160mm rotors with a 160mm PM frame/fork
This configuration is great for riders who want to retain their current braking feel while switching caliper types.

F8R8 Configuration – Increase Rotor Size
The F8R8 version is for those who need more stopping power by increasing rotor diameter: Use 160mm rotors on a 140mm PM frame/fork
Use 180mm rotors on a 160mm PM frame/fork
Ideal for heavy-duty use, steep descents, or loaded touring setups.

Wide Compatibility
This adapter is compatible with most bikes that feature standard 74mm PM mounts on the frame or fork. It supports installation of flat mount calipers commonly used on modern disc brake road bikes and gravel bikes.

Easy Installation
Includes mounting bolts for quick and secure setup. Simply attach the adapter between your PM frame/fork and FM caliper to convert your braking interface.

Upgrade your braking system with confidence using the ZTTO Disc Brake Adapter — a reliable solution for compatibility and performance.