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Shimano Dura-Ace Di2 BR-RS9170 Flat Mount Hydraulic Disc Brake
Sale price
$174.99
Regular price
$174.99
Prices subject to change. How pricing works →
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In Stock Ships in 1-2 weeks based on its location
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SKU: IBRR9170R1RF Option: Black / Rear
Pickup available at RA Cycles Brooklyn
Pickup available at RA Cycles Walnut Creek
Stock Availability by Location
RA Cycles Brooklyn In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
105 5th Ave, Brooklyn, NY 11217718-636-5242
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
RA Cycles Walnut Creek In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
2099 Mt Diablo Blvd, Walnut Creek, CA 94596925-433-7099
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
Distribution Center - East In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
Distribution Center - Central In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
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Shimano Dura-Ace Di2 BR-RS9170 Flat Mount Hydraulic Disc Brake
$174.99
Shimano Dura-Ace Di2 BR-RS9170 Flat Mount Hydraulic Disc Brake Info
The Shimano Dura-Ace BR-RS9170 Flat Mount Hydraulic Disc Brake is Shimano's flagship road disc caliper — smaller and lighter than its predecessors, yet engineered to shed heat faster and stop harder. The dual-piston design has been refined for a sharper balance of braking power and modulation, with pistons that self-adjust and retreat farther from the rotor to prevent rub caused by minor frame flex or imperfect wheel seating.
The lower-profile caliper sits tighter behind the fork and stays, reducing its wind footprint without compromising feel. Chamfered pad edges guide rotors in cleanly, and the gravity-bleed system makes maintenance straightforward — open the valve and the fluid does the work. These calipers mount via Shimano's flat mount standard and are sold individually; specify front or rear at checkout. Hydraulic hose and fluid are not included with the caliper alone — if you purchase compatible levers separately, hose and fluid are typically included with those. Rotors are sold separately; Shimano's SM-RT900 is the recommended pairing, available in 140mm and 160mm.
Shimano Dura-Ace BR-RS9170 Specs at a Glance
- Mount standard: Flat mount
- Piston configuration: Two-piston hydraulic
- Weight: Approx. 256g per caliper (515g per pair)
- Rotor compatibility: 140mm or 160mm (sold separately)
- Available as: Front or Rear (sold individually)
PRICE MATCH GUARANTEE
We will price match against advertised or quoted prices from other authorized dealers of the product!