Shimano Tiagra ST-4720-L User's Manual

Shimano Tiagra ST-4720-L Brake Lever manual cover

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Year 2022

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Shimano Tiagra ST-4720-L Brake Lever Specification

The Shimano Tiagra ST-4720-L Brake Lever is a meticulously engineered component designed for road cyclists seeking reliable performance and precise control. It is part of Shimano's Tiagra series, which is renowned for delivering a balance of performance and affordability. This brake lever is designed for use with hydraulic disc brakes, ensuring consistent and powerful braking performance in various weather conditions. The lever features a sleek, ergonomic design that prioritizes rider comfort and control, allowing for easy reach and operation even during long rides. Constructed with high-quality materials, the ST-4720-L is durable and lightweight, contributing to an overall reduction in bike weight without compromising strength. The lever incorporates Shimano's reach adjust technology, enabling fine-tuning of the lever position to accommodate different hand sizes and preferences. This feature enhances rider comfort and ensures optimal brake engagement. The ST-4720-L also integrates seamlessly with Shimano's Tiagra 10-speed shifting system, offering smooth and precise gear changes. This integration allows for intuitive operation, enabling cyclists to maintain focus and control. Overall, the Shimano Tiagra ST-4720-L Brake Lever represents a blend of innovation and practicality, making it an ideal choice for cyclists looking to enhance their road biking experience with reliable and efficient braking performance.

Shimano Tiagra ST-4720-L Brake Lever F.A.Q.

How do I adjust the reach on my Shimano Tiagra ST-4720-L brake lever?

To adjust the reach on your Shimano Tiagra ST-4720-L brake lever, use a 2mm hex key to turn the reach adjustment screw located on the inside of the lever body. Turning it clockwise will move the lever closer, while counterclockwise will move it further away.

What should I do if my brake lever feels spongy?

A spongy brake lever typically indicates air in the hydraulic system. Bleed the brake system by following Shimano's bleeding procedure for hydraulic brakes, ensuring all air bubbles are removed for optimal performance.

How can I replace the brake cable on the Shimano Tiagra ST-4720-L?

To replace the brake cable, first remove the cable cover on the lever. Pull out the old cable, then insert the new cable through the lever and housing, ensuring it is properly seated in the brake caliper. Adjust the cable tension as needed.

What maintenance should be performed regularly on the ST-4720-L brake lever?

Regular maintenance includes checking for proper hydraulic fluid levels, inspecting cable and housing for wear, ensuring bolts and screws are tightened, and cleaning the lever to remove dirt and debris.

Why is my brake lever not returning to its original position after braking?

If the brake lever does not return, check for any obstructions in the lever mechanism, ensure the return spring is functioning, and verify that the hydraulic system is properly bled and free of air.

How can I improve the braking power of my Shimano Tiagra ST-4720-L?

To improve braking power, ensure the brake pads are properly aligned and not worn out, the rotor is clean and free of oil, and the hydraulic system is fully bled without air bubbles.

What type of hydraulic fluid should I use for the Tiagra ST-4720-L lever?

Use Shimano Mineral Oil specifically designed for Shimano hydraulic disc brake systems to ensure optimal performance and compatibility with the Tiagra ST-4720-L lever.

How do I properly align the brake caliper with the rotor when using ST-4720-L levers?

Loosen the caliper mounting bolts, squeeze the brake lever to center the caliper over the rotor, and tighten the bolts while holding the lever. This centers the caliper automatically.

What could cause a squealing noise when braking with my ST-4720-L levers?

Squealing brakes can be caused by contaminated pads or rotors, misaligned calipers, or glazed pads. Clean the pads and rotors, realign the caliper, and sand the pads lightly if they are glazed.

How can I check if my Shimano Tiagra ST-4720-L levers need a bleed?

If the lever feels spongy, has excessive travel, or if braking power is reduced, it's likely that air has entered the system and a bleed is required to restore proper function.