Shimano flat-mount / post-mount adapter — the bracket that lets you run a non-standard rotor size on a given caliper mount. Required when you want 160 mm rotors on a frame / fork that's only drilled for 140 mm, or similar mismatches. This is the Shimano R160D/D Disc Brake Adapter.
Adapter
£ 12
Shimano flat-mount / post-mount adapter — the bracket that lets you run a non-standard rotor size on a given caliper mount. Required when you want 160 mm rotors on a frame / fork that's only drilled for 140 mm, or similar mismatches. This is the Shimano R160D/D Disc Brake Adapter.

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Shimano R160D/D Disc Brake Adapter
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Shimano R160D/D Disc Brake Adapter