SRAM 20mm Flat Mount Disc Brake Adaptor, Fits 160mm Rear Rotors

Ensure a secure, precision fit for your SRAM flat mount brakes with this essential adaptor.

This SRAM 20 mm Flat Mount Disc Brake Adapter lets you mount SRAM flat-mount calipers on frames designed for 160 mm rear rotors — moving the caliper outboard by 20 mm so your rotor and pads align perfectly. It’s a must-have when upgrading rotors or swapping calipers on bikes with flat-mount rear disc mounts.

Key Features

• Designed specifically for flat mount frames and SRAM brake calipers needing a 20 mm offset to fit 160 mm rear rotors.
• Includes precision-machined adaptor and stainless steel mounting bolts for secure, corrosion-resistant installation.
• Enables proper caliper positioning without frame modification — ideal for rotor upgrades or brake swaps.
• Durable aluminum construction balances strength and light weight. (See products below for specific material details.)

Why You Need It

SRAM flat-mount calipers are often designed around a 140 mm rotor as standard. To run a larger 160 mm rotor at the rear — whether for more braking power, better heat dissipation, or compatibility with specific wheelsets or riding styles — this 20 mm adaptor is the correct solution. It ensures optimal pad-to-rotor alignment and consistent performance without guesswork.

What’s Included

• One SRAM 20 mm flat mount brake adapter bracket
• Stainless steel mounting screws

Perfect For

• Road, gravel, and mountain bikes with flat mount rear brake mounts
• Riders upgrading to 160 mm rotors for better rear braking performance
• Swapping or upgrading flat mount calipers without changing the frame