Shimano ULTEGRA R8100 12-K.HTII Without Bearing

LEAVE TIME BEHIND 
Escape the everyday stereotype, discover endless possibilities and a feeling of freedom. Find out what really matters and get ahead of time with the new Ultegra. 

Optimal balance of stiffness, force, weight and rotational power. The structure of HOLLOWGLIDE chainrings reduces weight, but retains power for better power transmission and faster and more accurate shifting. 
Recommended middle composition: SM-BBR60, SM-BB7241B 

Specification: 

• Technologies used: Hollowtech II, Hollowglide 
• Total package weight: 750 g 
• Crank length: 172.5 mm, 175 mm 
• 12 speed 
• Number of teeth: 50/34, 52/36 
• Threaded Bottom Bracket Shell Width: 68/70 mm
• Chainring material: aluminum (top), aluminum (bottom)
• Chainring spacing: 110mm / 110mm