The Shimano Dura-Ace BB-7700 Bottom Bracket is crafted for cyclists who demand precision and performance. Designed for the road, this bottom bracket is part of the Octalink splined system, ensuring a secure and efficient connection. Key Features Precision engineered for the Dura-Ace 7700 series, ideal for road cycling. Features a 22 mm diameter chrome-moly hollow pipe billet axle, reducing overall weight. Splined interface offers a more rigid crank assembly compared to tapered designs. Compound bearing structure with ball and needle bearings supports the spindle, minimising flex. Maintenance-free sealed cartridge design prevents corrosion and simplifies installation. Average weight of 173 g, making it lightweight yet durable. The Shimano Dura-Ace BB-7700 Bottom Bracket combines advanced engineering with practical features, making it a reliable choice for serious cyclists. Its design ensures longevity and ease of use, allowing you to focus on your ride.