Description
Shimano Ultegra, 34.9 Clamp FD-6600 Front Derailleur 10 Speed Double
Has been inspected, Ultrasonic cleaned, and lubed. Ready to be used.
Inventory number: 09106 CR400
Industry Information:
The Shimano Ultegra FD-6600 front derailleur is a component from a significant era of road cycling, known for its durable and reliable performance. Here’s a breakdown of its industry information and compatibility.
Industry Information
- Market Position: The FD-6600 was part of Shimano’s Ultegra 6600 groupset, which was a mainstay of the mid-2000s road bike market. Positioned as the company’s second-tier offering, it was the “workhorse” of the enthusiast and club-level racing world. It provided a perfect balance of the high-end technology from the Dura-Ace line with the durability and cost-effectiveness of a more accessible groupset.
- 10-Speed Era: The FD-6600 was engineered for the new 10-speed drivetrains that were becoming the standard on mid-to-high-end road bikes. It was designed to work seamlessly with the narrower 10-speed chains and the wider spacing of 10-speed cassettes and cranksets.
- “Double” Configuration: The FD-6600 model is specifically for double cranksets (two chainrings). This was the most common configuration for road racing and performance-oriented road bikes at the time. A separate model, the FD-6603, was made for triple cranksets.
- Aesthetics: The FD-6600 featured a clean, understated aesthetic that was a hallmark of the 6600 groupset. It was available in both a silver and “Ice Gray” finish.
Compatibility
Compatibility is a crucial consideration for a front derailleur, as it must function seamlessly with several other components in the drivetrain.
- Clamp Diameter (34.9mm): The “34.9 Clamp” refers to the diameter of the clamp that attaches the derailleur to the frame’s seat tube. This is a crucial, non-negotiable measurement. It must match the outer diameter of the frame. It is a standard modern size, but many bikes also use 31.8mm. The good news is that many clamp-on front derailleurs can be used with a shim to fit a smaller diameter seat tube.
- Drivetrain Speeds: The FD-6600 is designed for 10-speed drivetrains only. Although it may technically be compatible with a 9-speed shifter, the cable pull ratio and cage width are optimized for a 10-speed chain. It is not compatible with 11-speed or 12-speed systems.
- Chainring Configuration: The “Double” designation means the derailleur is designed for a 2×10 setup. The shape of the cage and the shifting action are optimized for the two chainrings of a double crankset. It should not be used with a triple crankset.
- Crankset Compatibility: The FD-6600 is designed for use with Shimano’s FC-6600 series double crankset, which features a specific chainline (43.5mm) and a maximum tooth difference of 15 teeth between the large and small chainrings. While it may work with some other brands’ cranksets, a Shimano crankset is recommended for optimal shifting performance.
- Shifter Compatibility: The front derailleur must be paired with a compatible shifter, such as a Shimano Ultegra ST-6600, ST-6603, or Dura-Ace ST-7800 shifter. The cable pull ratio of the shifter must match the front derailleur for smooth and reliable shifting.
- Aftermarket Status: The Shimano 6600 series is no longer in production. The FD-6600 is now an aftermarket product, highly sought after for restoration projects and as a replacement part for a bike with a broken or worn-out front derailleur.
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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.
