Zipp
Vuma Chrono Aero Time Trial Crankset + Ceramic B/Bracket

• The VumaChrono uses a massive 30mm aluminum spindle and is by far the stiffest crankset ever tested by Zipp
• Weight is kept to just 860g including the bottom bracket (172.5mm, 53/39).
• The VumaChrono has a unique, spider-less design with outer chainring held in place by 9 screws around the perimeter of the carbon face. The inner chainring has its own set of bolts, making the VumaChrono the first crank intended to accommodate both single and double chainring setups.
• The VumaChrono has an ultra-narrow 146mm Q-factor.
• Supplied with Zipp bottom bracket with grade 3 ceramic bearings.
• Supplied with a Pedro's bottom bracket installation tool
• Supplied with a spacer kit for compatibility with the BB30 bottom bracket standard
• Available in 6 lengths from 167.5mm to 180mm and three chainring combinations: 53/39, 54/42, or 55/42
• Weight - 860g including bottom bracket