🚴 Welcome to Traveling Ground
 
We’re a mission-driven bike shop where every sale supports something bigger. A portion of each purchase helps refurbish and donate bikes to Bicycles for Humanity Colorado. When you ride, you’re helping someone else ride too.
 
🔧 Why This Bottom Bracket Is So Good
The Shimano SM-FC6601 is a Hollowtech II bottom bracket designed for Ultegra 6600-series cranksets, offering a balance of stiffness, durability, and smooth rotation. Its external bearing design provides efficient power transfer and ease of maintenance, making it a reliable choice for road cyclists.
 
✅ Specs:
Model: Shimano SM-FC6601 Ultegra
Type: Hollowtech II External Bottom Bracket
Shell Compatibility: 68mm English-threaded (BSA)
Spindle Interface: 24mm Hollowtech II
Bearings: Sealed cartridge
Color: Silver
Weight: Approximately 93g
Made in Japan
 
🧰 Condition:
Used, in good condition. Bearings feel smooth with minimal signs of wear. Threads are clean and intact.
 
📦 What’s Included:
Shimano SM-FC6601 bottom bracket cups (left and right)
Inner sleeve and O-rings