DISC BRAKE ADAPTER, MA90, FOR 160MM OR 180MM ROTOR

Product Information

This Shimano SM-MA90 disc brake adapter is your solution for cleanly increasing rotor size on bikes with Postmount brakes and frames or forks. Built from machined aluminum, it ensures a lightweight yet rigid connection between your caliper and mount. This particular adapter, often identified as SM-MA90-F180P/P, is designed to enable the use of a 160mm rotor on a 140mm post mount, or a 180mm rotor on a 160mm post mount, giving you flexibility to fine-tune your braking power. It's compatible with all Shimano 74mm post mount brake calipers, making it a versatile upgrade.

Features

• Designed for Postmount to Postmount brake caliper and frame/fork interfaces.
• Enables use of larger rotors: 160mm on 140mm mounts, or 180mm on 160mm mounts.
• Compatible with all Shimano 74mm post mount brake calipers.
• Includes surface-treated washers and a safety wire for secure bolt fixing.

Specs

• Material: Aluminum (adapter), Steel (screws)
• Weight: Approximately 12g (SM-MA90-F180P/P, without fixing material)
• Mount Type: Postmount to Postmount
• Rotor Compatibility: 160mm or 180mm (depending on original mount size)