Shimano Dura Ace BR-R9170 Rear Flat-Mount Disc Brake Caliper

Shimano Dura Ace BR-R9170 Rear Flat-Mount Disc Brake Caliper Shimano

Shimano Dura Ace BR-R9170 Rear Flat-Mount Disc Brake Caliper

Shimano Dura Ace BR-R9170 Rear Flat-Mount Disc Brake Caliper

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What Sets the Shimano Dura-Ace BR-R9170 Rear Caliper Apart?

The Shimano Dura-Ace BR-R9170 is the flagship rear flat-mount hydraulic disc brake caliper, delivering the precise modulation and consistent stopping power that defines the Dura-Ace disc brake standard. The flat-mount architecture integrates cleanly into modern road disc frames, reducing weight and drag compared to post-mount designs while enabling the low-profile lines that aero-focused road bikes demand. Dura-Ace-grade piston construction ensures repeatable brake feel and smooth release across thousands of braking cycles, maintaining the same feedback whether you're on the fourth descent of the day or the first.

Rear caliper only. Compatible with Shimano Dura-Ace R9100 and R9150 Di2 disc brake groupsets and paired STI levers. Uses Shimano mineral oil hydraulic fluid. Pairs with the BR-R9170 front caliper for a complete Dura-Ace road disc brake set. MPN available on request.

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$149.99
$149.99 $171.99
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1 in stock

  • Orders over $100 ship free!
  • Estimated delivery: May 24 - May 28

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Specifications

  • Model: BR-R9170 (Rear)
  • Series: Shimano Dura-Ace
  • Type: Hydraulic disc brake caliper
  • Mount: Flat-mount
  • Side: Rear only
  • Hydraulic Fluid: Shimano mineral oil
  • Compatible Groupsets: Dura-Ace R9100, R9150 Di2
  • Sold As: Rear caliper only

FAQ

Is the BR-R9170 compatible with Ultegra R8000 levers?

Yes. Shimano hydraulic disc calipers are broadly cross-compatible within the road hydraulic ecosystem. The BR-R9170 works with Ultegra R8000, R8070 Di2, and Dura-Ace R9100/R9150 STI levers using Shimano mineral oil.

What rotor sizes work with the BR-R9170?

The BR-R9170 supports 140mm and 160mm rotors front and rear, using flat-mount rotor adapters where required. Confirm your frame's flat-mount spec before selecting an adapter.

Is this sold as a front and rear set?

No. This listing is for the rear caliper only. The BR-R9170 front caliper is sold separately. Both are required for a complete Dura-Ace hydraulic disc brake setup.

Best For

Road cyclists building or completing a Shimano Dura-Ace R9100 or R9150 Di2 hydraulic disc brake setup who need the rear caliper for precise, flat-mount disc braking at the Dura-Ace standard.

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