Shimano ST-R4020 Tiagra mechanical shift hydraulic STI lever, 11-speed

From £174.99

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Sigma Sports
£174.99

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Price last checked: 19/06/2026

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Shimano ST-R4020 Tiagra mechanical shift hydraulic STI lever, 11-speed

Shimano ST-R4020 Tiagra mechanical shift hydraulic STI lever Experience precise shifting and confident braking with the Shimano Tiagra ST-R4020 left-hand hydraulic disc brake and shift lever. Its slim, ergonomic design fits naturally in your hand, while the short shift arc allows rapid and accurate 2-speed gear changes with minimal effort. The hydraulic brake lever delivers powerful, controllable stopping performance, especially from the hood position, and the auto-adjusting reservoir maintains consistent pad-to-rotor clearance as pads wear. With tuneable reach adjusters and an easy-to-bleed hydraulic system using Shimano mineral oil, this lever provides reliable performance and smooth operation. Compatible with 11-speed chains and RD-R4000 or RD-U6040 rear derailleurs, it’s a smart upgrade for riders seeking efficiency, comfort, and dependable braking.

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Right Lever/Front Caliper £174.99 Left Lever/Rear Caliper £174.99

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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.