Shimano Disc Mount Adapter 120mm to 140mm (SM MA F180P/P2)

Overview

The Shimano Disc Mount Adapter is designed to convert 120mm disc brake mounts to accept 140mm disc rotors. This adapter kit enables riders to upgrade rotor size for improved braking performance without replacing the frame or fork. The kit includes the 140mm adapter, mounting bolts, and washers for a complete installation solution.

Key Features

• 120mm to 140mm Conversion — Allows use of 140mm disc rotors with frames or forks featuring 120mm disc brake mounts; provides straightforward rotor size upgrade path

• Complete Kit — Includes 140mm adapter, mounting bolts, and washers; all necessary hardware provided for hassle free installation

• Premium Shimano Quality — Manufactured to Shimano's exacting standards for precision fitment and reliable braking performance

• Durable Finish — Black anodized finish with laser etched logos; resists corrosion and maintains professional appearance over extended use

• Universal Application — Designed to work with any 120mm disc brake mount; compatible with various brake caliper brands (check caliper compatibility)

• Easy Installation — Simple bolt on design requires basic tools; clear fitment for straightforward mounting

Technical Specifications

• Product type: Disc brake mount adapter

• Conversion: 120mm to 140mm rotor size

• Finish: Black anodized with laser etched logos

• Kit includes: 140mm adapter, mounting bolts, washers

• Compatibility: 120mm disc brake mounts

Compatibility & Ideal Use Cases

Designed for use with any 120mm disc brake mount to accept 140mm disc rotors. Compatible with various disc brake caliper brands — verify caliper fitment with the adapter before purchase. Use only with 140mm disc rotors; not suitable for other rotor sizes. Ideal for riders seeking increased braking power and heat dissipation through larger rotor size. Suitable for BMX racing, mountain biking, and other disc brake applications where rotor upgrade is desired. Works with post mount or IS mount configurations depending on specific adapter variant. Not compatible with frames or forks designed for different mount standards. Verify existing mount type (post mount or IS mount) before ordering. Installation requires appropriate torque specifications for mounting bolts. The adapter positions the caliper correctly for proper pad contact with the 140mm rotor. Pair with compatible 140mm disc rotors for complete braking system upgrade.