Description
Shimano Ultegra BR-6600 Road Bike Dual Pivot Side Pull Caliper Brake Front/Rear
Works with Ultegra ST-6600, 105 ST-5600, Tiagra, Sora, Claris, and Dure-Ace Road Bicycle Cable Shifters.
Has been inspected, ultrasonic cleaned, and lubed. Ready to be used.
Inventory number: 010102 SR
Industry Description:
The Shimano Ultegra BR-6600 is a classic dual-pivot side-pull caliper brake that was part of the Ultegra 6600 groupset, a popular and well-regarded 10-speed road group from the mid-2000s. These brakes are a great option for a vintage road bike build or as an upgrade to a bike with lower-end calipers.
Key Features and Compatibility:
- Dual-Pivot Design: Like its predecessors, the BR-6600 utilizes a dual-pivot design for enhanced braking power and improved modulation over older single-pivot models. It’s often praised for its excellent stopping power and smooth feel.
- “Super SLR” Compatibility: These brakes are designed to work with Shimano’s “Super SLR” road levers. While they will physically work with older levers, they are optimized for the cable pull ratio of the 6600, 6500, and other compatible 10-speed or 9-speed levers. Mixing with much newer (11-speed or 12-speed) levers may result in a different feel and reduced braking performance.
- Standard Road Mount: The brakes are a standard “center mount” design, attaching to the frame and fork with a recessed nut.
- Reach: The BR-6600 has a “short reach” of 39-49mm, which is the standard for most modern and classic road bike frames. This measurement is crucial to ensure the brake pads align correctly with the rim’s braking surface.
- Cartridge Brake Pads: The calipers use cartridge-style brake pads, which allows for easy replacement of the pad inserts without needing to replace the entire brake shoe holder. Many modern replacement pads are available and can significantly improve braking performance, especially in wet conditions.
- Cold Forged Aluminum: The cold-forged aluminum construction provides a strong yet lightweight caliper body, ensuring durability and consistent performance.
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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.

















