Shimano Dura-Ace Rear Brake, Direct Mount, RS9110

If your bike boasts mounts for direct-mount brakes, you've got a savvy builder. These brakes trim weight, enhance clearance, and sometimes boost aerodynamics. Shimano offers three Dura-Ace 9100 versions: one for the fork (BR-9110-F, 155g), one for the seat stays (BR-9110RS, 152g), and one for under the bottom bracket (BR9110-R, 133g), each sold separately.They all operate on the dual-pivot concept, first seen in the 9000 series and refined here. More than just a fresh finish, the arms have been reshaped and elongated to accommodate wider tires. Shimano claims these brakes can handle 28mm tires, suggesting even larger tires could fit, though no guarantees are given. A stabilizer between the pivots stiffens the arms, reducing system flex for more predictable braking.The F and RS versions feature sleeker arm shapes with less space between them, potentially aiding aerodynamics. Regardless, they take up less space and look better. A practical and potentially aerodynamic improvement is the micro-adjuster, which sits flush with the brake arm when closed, reducing the risk of snags or breaks. There's also a barrel-adjuster at the cable-housing stop arm's top.As always, a centering bolt is easily accessible from the top, and Shimano's aluminum rim-specific pads come standard. Remember to switch to carbon rim-specific pads when using wheels with carbon-fiber braking surfaces.The Shimano Dura-Ace BR-9110 Direct Mount Brake uses specific frame mounts to deliver lighter and stiffer braking, two benefits everyone should appreciate.

• Advantages of Direct Mount Brakes: Weight Reduction, Enhanced Clearance, Potential Aerodynamic Improvement
• Shimano's Dura-Ace 9100 Range: Three Versions for Fork, Seat Stays, and Bottom Bracket
• Consistent Dual-Pivot Concept: Evolved from Dura-Ace 9000 Series
• Design Evolution: Pivots Retained, Arms Reshaped and Lengthened for Wider Tires
• Tire Compatibility: Shimano Claims 28mm Tires, Larger Sizes Possible
• Stability Enhancement: Stabilizer Added Between Pivots
• Aerodynamic Design: Sleeker Arms on F and RS Versions
• Space and Aesthetics: Reduced Space Occupation, Improved Appearance
• Micro-Adjuster Improvement: Practical and Potentially Aerodynamic
• Snag-Proof Micro-Adjuster: Flush Positioning for Protection
• Additional Adjustment: Barrel-Adjuster on Cable-Housing Stop Arm
• Centering Bolt Accessibility: Top-Mounted for Easy Use
• Brake Pads: Standard Aluminum Rim-Specific Pads, Compatible with Aftermarket Pads
• Efficient Braking: Direct Mount Brake Utilizes Specific Frame Mounts for Lighter, Stiffer Performance