Description
Shimano Ultegra, Braze-On FD-6603 Front Derailleur 10 Speed Triple
Has been inspected, Ultrasonic cleaned, and lubed. Ready to be used.
Inventory number: 08303 TM-SL25
Industry Information:
The Shimano Ultegra FD-6603 is a 10-speed, braze-on front derailleur designed specifically for triple cranksets. As a part of the Ultegra 6600 series, it was a high-performance component in the mid-2000s, known for its smooth and reliable shifting.
Key Features and Compatibility:
- Triple Crankset: This derailleur is engineered to work with a three-chainring setup. It is not compatible with double cranksets due to the difference in cage width and geometry.
- 10-Speed System: The FD-6603 is optimized for use with a 10-speed chain (like the Shimano CN-6600). It must be paired with 10-speed road triple shifters, such as the Shimano Ultegra ST-6603, Dura-Ace ST-7803, or 105 ST-5600. Using it with shifters from a different generation (like the newer Tiagra 4700 series) is not recommended due to different cable pull ratios.
- Braze-On Mount: This version of the derailleur mounts directly to a “braze-on” tab that is already on the bike frame’s seat tube. If your frame doesn’t have a braze-on tab, you can use a braze-on adapter clamp, which comes in various diameters (28.6mm, 31.8mm, 34.9mm).
- Cable Pull: The FD-6603 is a “bottom-pull” derailleur, meaning the shift cable comes up from the bottom of the bottom bracket shell to actuate the derailleur.
- Chainring Compatibility: It is designed to work with a maximum large chainring of 52 teeth and a total capacity of up to 22 teeth (meaning the difference between your largest and smallest chainring should not exceed 22).
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Front: (Double) Shimano Ultegra, Braze-On FD-6600 (Triple) Shimano Ultegra, Braze-On FD-6603
A little about the seller:
I’ve been in the cycling industry for more than 30 years (I know, that makes me old!). I’ve been a professional bicycle mechanic for most of those years, including working locally at Lee’s Cyclery before they became Trek Stores. Now I work from home as a Customer Success Manager for a software team. But I still love fixing up and working on bikes and riding them too!
Purchase from me with peace of mind. Not only can you trust my years of experience, but I will also fit you for the bike and provide any mechanical insight at the time of purchase.
Shipping information:
I ship USPS Ground. I try to keep it simple. It will be packed very well, but if you see any damage to the box or Part, keep the box and packing material plus, take pictures. I do insure all parts that are shipped. In addition, if shipped out of Colorado, there is no Sales Tax. You can also combine shipping with multiple items.
