Shimano ST-R7170 105 Di2 STI Left Rear Brake Caliper

From £189.00

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Sigma Sports
£189.00

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Price last checked: 03/10/2026

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Shimano ST-R7170 105 Di2 STI Left Rear Brake Caliper

Shimano 105 R7170 Hydraulic Disc Di2 Left Rear Lever and Caliper The Shimano 105 R7170 Hydraulic Disc Di2 Left Rear Lever and Caliper set includes the left hand shifter to operate the front derailleur, the flat mount caliper for the rear wheel and a fully bled hose. Shimano’s latest electronic Di2 105 shifters communicate wirelessly with the frame’s derailleur and battery system, making fitting easier and the front end cleaner. Although the levers are in exactly the same place as with the mechanical STI units, all that is needed to switch chainrings is a light press on the lever for an instant change. When a different sprocket is selected at the rear, the front derailleur also moves if necessary to prevent chain rub. There are also two different shifting programmes that can be selected, with full and semi synchronised modes providing two different ways to automatically ensure that optimal cadence is maintained. The lever units also house the reservoir for the hydraulic brakes, with the caliper featuring an auto adjust to maintain brake feel and performance as the pads wear down. Two 22mm ceramic pistons in the caliper provide plenty of power and modulation whilst the finned L05A resin compound pads have excellent temperature regulation and bite. There is a wide range of reach adjustment for the brake lever so that all hand sizes can be accommodated.

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Left Lever/Rear Caliper £189.00

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About: Shimano

Shimano is a leading brand in the cycling industry, renowned for its high-quality components and innovative technology. The company offers a range of cycling products, including drivetrains, brakes, wheels, pedals, and shoes. Shimano's drivetrain components, such as its derailleurs and shifters, are widely regarded as some of the best on the market, providing smooth and reliable shifting for cyclists of all levels. The company's disc brakes are also highly regarded, providing excellent stopping power and modulation. With a commitment to innovation and a focus on the needs of cyclists, Shimano continues to be a go-to choice for cyclists looking for top-of-the-line components for their bikes.

About: Sigma Sports

Sigma Sports is a leading cycling and triathlon retailer based in the United Kingdom. Sigma Sports provides a comprehensive range of products catering to cyclists, triathletes, and outdoor enthusiasts. The store offers a diverse selection of bicycles, cycling accessories, apparel, and gear from well-known brands. Sigma Sports is known for its commitment to quality, customer service, and expertise in the cycling industry. The retailer has both a physical store and a robust online presence, making it convenient for customers to explore and purchase products. Sigma Sports is often associated with a wide range of cycling disciplines, including road cycling, mountain biking, and triathlon.