Shimano MTB FD-M670 Dealer's Manual

Shimano MTB FD-M670 Front Derailleur manual cover
Pages 37
Year 2016
Language(s)
English en

Shimano MTB FD-M670 Front Derailleur Specification

The Shimano MTB FD-M670 Front Derailleur is a high-performance component designed for mountain biking enthusiasts seeking precision and reliability in gear shifting. It is part of Shimano's Deore XT series, known for its durability and enhanced shifting capabilities. The FD-M670 features a dual-pull design, which allows for versatile cable routing options, accommodating both top and bottom cable pulls. This flexibility ensures compatibility with a wide range of bike frames.

Engineered for optimal performance, the FD-M670 supports a 3x10-speed drivetrain, providing smooth and accurate shifts across the gear range. It is designed to fit a 66-69 degree chainstay angle and is compatible with 40-42 tooth outer chainrings, making it suitable for various mountain biking terrains. The derailleur uses Shimano's Wide Link design, which increases rigidity and reduces shifting deflection, contributing to more stable and consistent gear changes.

Constructed from high-quality materials, the FD-M670 offers excellent resistance to the elements and wear, ensuring longevity even under demanding conditions. Its clamp band design is available in multiple sizes, allowing for easy installation on different seat tube diameters. The inclusion of an integrated cable tension adjustment feature simplifies setup and fine-tuning, enhancing the overall user experience.

The Shimano MTB FD-M670 Front Derailleur is a testament to Shimano's commitment to innovation and performance in cycling components, making it an ideal choice for riders looking to enhance their mountain biking experience with reliable and efficient gear shifting.

Shimano MTB FD-M670 Front Derailleur F.A.Q.

How do I adjust the Shimano FD-M670 front derailleur for accurate shifting?

To adjust the Shimano FD-M670 front derailleur, start by setting the height and angle of the derailleur. Ensure the outer plate of the derailleur cage is parallel to the chainring. Adjust the height so the derailleur cage is 1-3mm above the largest chainring. Use the limit screws to set the low and high limit positions, and fine-tune with the barrel adjuster on the shifter cable.

What should I do if the chain rubs against the front derailleur?

If the chain rubs against the front derailleur, first check the derailleur alignment and adjust the angle and height if necessary. Then, adjust the limit screws to ensure the derailleur does not move too far inward or outward. Finally, use the barrel adjuster to fine-tune the cable tension for smooth shifting.

How do I install the Shimano FD-M670 front derailleur?

To install the Shimano FD-M670 front derailleur, attach it to the seat tube of your bike. Position the derailleur so that its cage is parallel to the chainrings and 1-3mm above the largest chainring. Secure it by tightening the clamp bolt. Ensure the derailleur moves smoothly across all chainrings by adjusting the limit screws and cable tension.

Why is my front derailleur not shifting properly?

Improper shifting can be due to incorrect cable tension, misaligned derailleur, or bent derailleur components. Check that the derailleur cage is parallel to the chainrings and at the correct height. Ensure the cable is not worn or frayed and adjust the cable tension using the barrel adjuster.

What maintenance does the Shimano FD-M670 front derailleur require?

Regular maintenance of the Shimano FD-M670 includes cleaning the derailleur to remove dirt and debris, lubricating the pivot points to ensure smooth movement, and checking the alignment and tension of the derailleur. Periodically inspect the cables and housing for wear and replace them if necessary.

Can I use the Shimano FD-M670 front derailleur with a 3x drivetrain?

Yes, the Shimano FD-M670 front derailleur is designed for use with a 3x drivetrain system. It is compatible with triple chainring setups and provides reliable shifting across all three chainrings.

How can I prevent chain drop with my Shimano FD-M670 front derailleur?

To prevent chain drop, ensure the derailleur is properly aligned and adjusted. Check that the limit screws are set correctly to prevent the chain from moving too far inward or outward. Maintaining proper cable tension and ensuring the chain is the correct length can also help prevent chain drop.

Is the Shimano FD-M670 front derailleur compatible with all frame types?

The Shimano FD-M670 front derailleur is compatible with most frames that have a clamp mount or direct mount fitting. However, it's important to check the specifications of your bike frame to ensure compatibility, particularly regarding the clamp diameter and mount type.

How do I know when to replace my Shimano FD-M670 front derailleur?

Replace your Shimano FD-M670 front derailleur if you notice significant wear, bending, or damage that affects its performance. Difficulty in achieving smooth shifting even after adjustments, excessive play in the pivot points, or visible cracks are indicators that replacement might be necessary.

What tools do I need to adjust the Shimano FD-M670 front derailleur?

To adjust the Shimano FD-M670 front derailleur, you will need a Phillips screwdriver for the limit screws, a 5mm Allen wrench for the mounting bolt, and a barrel adjuster or pliers for cable tension adjustments. Having a chain checker tool can also be helpful to ensure the chain is in good condition.