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