Shimano Tiagra FD-4703-B front derailleur, triple chainring, 10-speed – IFD4703BSM

Shimano ’s Tiagra FD-4703-B front derailleur is specially designed for 3x10-speed road drivetrains with triple chainrings. Part of the Tiagra 4700 groupset, it offers precise, smooth and reliable chainring changes for cyclists seeking a wide range of gear ratios suitable for long distances, mountainous routes and cycle touring. Its robust design ensures excellent durability whilst maintaining a level of performance comparable to the brand’s higher-end road groupsets.

Featuring a clamp-on mount (version B), this derailleur is compatible with seat tube diameters of 28.6 mm, 31.8 mm and 34.9 mm. Its Down Swing design improves the rigidity of the assembly and facilitates fast, precise chainring changes, even under load. It is designed to work with a triple crankset up to 50 teeth and a total capacity of 20 teeth.

Compatible with Shimano HG-X 10-speed chains, the FD-4703-B is an ideal solution for servicing or refurbishing a road bike fitted with a Tiagra 4703 triple crankset drivetrain.

Key features

• Compatible with Shimano 3x10-speed road drivetrains.
• Designed for triple-chainring cranksets.
• Clamp mounting (28.6 / 31.8 / 34.9 mm).
• Down Swing technology for improved stiffness.
• Compatible with HG-X 10-speed chains.
• Large chainring up to 50 teeth.
• Total capacity of 20 teeth.
• Ideal for cycle touring, endurance riding and hilly routes.

FAQ

Is this front derailleur compatible with a Shimano Tiagra 4700 double-chainring drivetrain?

No. The FD-4703-B is specifically designed for triple-chainring drivetrains and must be used with Shimano Tiagra 4703 shifters compatible with 3x10-speed systems.

What is its maximum capacity?

The Shimano FD-4703-B accommodates a large chainring of up to 50 teeth, with a total capacity of 20 teeth and a maximum difference of 11 teeth between the large and intermediate chainrings.

Which seatpost diameters are compatible?

This clamp-on version is compatible with 28.6 mm, 31.8 mm and 34.9 mm seat tubes.

What type of cycling is it recommended for?

It is ideal for road bikes used for endurance riding, sport cycling, cycle touring and cycle touring trips requiring a wide range of gear ratios thanks to the triple chainring.

Can it be used with a triple-chainring MTB crankset?

This is not recommended. The FD-4703-B is designed for road bike geometries, with a chainline and cable routing specific to road groupsets Shimano.