The Shimano Tiagra FD-4700 brazed-on front derailleur marks a significant upgrade over previous Tiagra generations, reflecting Shimano’s effort to bring more refined shifting technology to the entry-level 10-speed road segment. This derailleur blends high-performance features inspired by the 105 and Ultegra groupsets with the durability and affordability that recreational and fitness riders need.

The brazed-on mount type offers a secure and precise connection to the frame, minimizing flex and ensuring that the derailleur cage aligns perfectly with the chainrings — a critical factor for crisp, reliable front shifting.

⚙️ Engineering Highlights:

• Wide Link Design:
  The wide link cage increases rigidity, reducing flex during shifts. This rigidity leads to smoother and more positive chain engagement, especially important under load when climbing or sprinting.

• Improved Cage Shape:
  The redesigned cage geometry accommodates modern chainring sizes (34–52 teeth) and wider 10-speed chains, reducing chain drop and rub.

• Cable Routing:
  This model is a bottom-pull type, compatible with most road frames designed for the 4700 series. The cable tension and routing optimize shifting speed and consistency.

• Lightweight Construction:
  Despite its solid build, the FD-4700 remains lightweight (~90 grams), contributing to overall bike performance without adding unnecessary weight.

🔄 Performance in Real-World Use:

• The FD-4700 delivers precise front shifts with minimal effort, even under heavy pedaling loads, thanks to its stiff cage and optimized geometry.

• It responds well to fine tuning, allowing mechanics and riders to dial in perfect chainring changes, reducing noise and chain rub.

• While designed for 10-speed systems, it performs best with compatible Tiagra 4700 shifters, although it can work with other 10-speed road shifters if properly adjusted.

✅ Pros:

• Great balance of cost, weight, and performance

• Durable construction with wide link design

• Smooth, crisp shifting on 10-speed road setups

• Compatible with a broad range of chainring sizes

• Reliable in various weather and road conditions

❌ Cons:

• Limited to 10-speed drivetrains; upgrading to 11 or 12-speed requires different derailleurs

• Requires precise adjustment to avoid chain rub on some frames

• Not compatible with non-road or triple chainring setups

🧰 Ideal For:

• Enthusiast road cyclists stepping up from 8/9-speed systems

• Fitness riders and commuters wanting reliable 10-speed shifting

• Mechanics and DIY cyclists seeking affordable, quality components for 10-speed builds